A few years ago, bubble tea(奶茶) exploded as a popular drink for Internet foodies(吃货) everywhere. Many take this Taiwanese drink as a guilt-free snack similar to juice or a cup of coffee. After all, it has the word "tea" in it, so it has to be healthy…right?

    Not quite. Like coffee, bubble tea's ingredients(成分，配料) might not be so bad on their own, but when they're loaded with sweetener(甜味剂) and artificial flavor(人工香料), they lose their nutritional (营养的) value fast.

    It all starts with those "bubbles" found at the bottom of your drink, which are actually round pieces of tapioca(木薯淀粉). Called "tapioca pearls(珍珠)," they're actually made from a vegetable that grows in South America. And as it turns out, those little balls are loaded with sugar—and not the nutritious, fiber-rich(富含纤维) kinds found in whole grains(全麦类), either.

Cooking tapioca pearls only makes it worse. They're typically fried in hot water, along with even more added sugar, for up to three hours. By that point, these balls could have nearly 160 calories per ¼ cup.

    And don't even get us started on what comes in the extra syrups(糖浆). Thanks to all those processed(加工的) ingredients, the average bubble tea can easily reach 300 to 400 calories per cup!

    On top of being an unhealthy habit, bubble tea could even shorten your life. In 2012, a group of German researchers from the University Hospital Aachen reportedly found aspolychlorinated biphenyls, or PCBs, in tapioca ball samples. These cancer-causing chemicals have also been shown to have other bad effects on the immune(免疫), reproductive(生殖), and nervous systems.

    You might want to lay off your bubble tea addiction. Thankfully, we have a few choices for low-calorie, healthier drinks, instead.

    Chinese retail giant Alibaba has developed a new automated(自动化的) vehicle which is easy to mass-produce and could serve a number of functions. These could include delivery messenger or automated coffee selling machine, it said.

    The Cainiao G Plus can travel at up to nine miles per hour, reports The Verge news site. It was showed at a conference where Alibaba founder Jack Ma announced a 100bn yuan ($15.5bn) would be put into smart logistics(物流).This includes devices such as warehouse robots as well as delivery aids.

    AI expert and author Calum Chace described the G Plus as being like the "ugly big brother" of a delivery project developed by UK firm Starship Technologies. Starship has been working on this project for several years, so the Alibaba project looks to be behind as well as ugly, he said. "But that won't matter. Anything to do with artificial intelligence is put in the first place for China, which has set itself the target of overtaking the US as world leader in AI by 2030".

    China benefits from having free access to large amounts of data, essential for training algorithms(算法), he added, probably a disadvantage in Europe since the introduction of GDPR law, designed to protect privacy.

    "Don't bet against the Chinese pulling ahead in any AI-related competition, be it self-driving cars, facial recognition, or delivery projects," Mr Chace said.

    The G Plus vehicle is fitted with solid state Lidar – the laser sensors which form an important part of the system autonomous vehicles use to be aware of their surroundings.

    Solid state Lidar is cheaper and easier to produce than the traditional system, which involves spinning multiple lasers in circles to help build up a 360-degree image of what surrounds the vehicle. There are various developers creating their own versions but essentially it uses fewer lasers and a tiny swinging mirror.

    Last month BMW said that its autonomous vehicles will be fitted with solid state Lidar when they will be launched in 2021.

    Body language is the quietest, secretest and mostpowerful language of all! It is said that our body movements communicate about 50 percent of what we really mean while words only express 7 percent. So, while your mouth is closed, your body is just saying...

    Arms. How you hold your arms shows how open and receptive you are to people you meet. If you keep your arms to the sides of your body or behind your back, this suggests you are not afraid of taking on whatever comes your way. Outgoing people generally use their arms with big movements, while quieter people keep them close to their bodies. If someone upsets you, just cross your arms to show you're unhappy!

    Head. When you want to appear confident, keep your head level. If you are a monitor in class, you can also take on this position when you want your words to be taken seriously. However, to be friendly in listening or speaking, you must move your head a little.

    Legs. Your legs tend to move around a lot more than normal when you are nervous or telling lies. If you are at interviews, try to keep them still!

    Posture (姿势). A good posture makes you feel better about yourself. If you are feeling down, you normally don't kit straight, with your shoulders inwards. This makes breathing more difficult, which can make you feel nervous or uncomfortable.

    Mouth. When you are thinking, you often purse your lips. You might also use this position to hold back an angry comment you don't wish to show. However, it will probably still be noticed, and people will know you're not pleased.

    Face. When you lie, you might put on a false face. But that expression would crack briefly, allowing displays of true emotions such as happiness, sadness, disgust(厌恶)and fear to come through.

    Dr. Nancy Roman, born in 1925, who was celebrated as a pioneer for female scientists and had advanced the launch of the Hubble Space Telescope, died on Dec 25, 2018.

    When Nancy Roman asked for permission to take a second algebra (代数)course in high school,a teacher demanded to know "what lady would take mathematics instead of Latin". In college, a professor admitted that he often tried to prevent women from majoring in physics but Nancy stuck to it. And after receiving Doctor's degree in astronomy. , she found a professional home at NASA(美国宇航局)In 1959, Dr. Roman became the first chief of astronomy at NASA. headquarters, a role that made her one of the agency's first female leaders.

    Dr Roman spent much of her career helping develop, fund and promote technology that would help scientists see more clearly beyond Earths atmosphere. But her most well-known work was perhaps leading to design the Hubble Space Telescope the first major telescope to be sent into space for the purpose of gathering photographs and data from the universe. She was, therefore, named as "the mother of Hubble".

    "She made it possible to get the early telescope up into space to learn what needed to be learned," said science historian Bob Zimmerman: and her hard-nosed nature helped get the telescope built.

    The telescope did not launch until 1990, a little more than a decade after Dr Roman retired, but when it did, its photographs of the universe thrilled the world.  I am glad, "she once told Science, "I ignored the people who told me that I could not be an astronomer. "

    All around the world, lawyers generate more hostility(敌视) than the members of any other profession-with the possible exception of journalism. But there are few places where clients have more grounds for complaint than America.

    During the decade before the economic crisis, spending on legal services in America grew twice as fast as inflation. The best lawyers made skyscrapers-full of money, tempting ever more students to pile into law schools. But most law graduates never get a big-firm job. Many of them instead become the kind of nuisance-lawsuit filer that makes the tort system a costly nightmare.

    There are many reasons for this. One is the excessive costs of a legal education. There is just one path for a lawyer in most American states: a four-year undergraduate degree in some unrelated subjects, then a three-year law degree at one of 200 law schools authorized by the American Bar Association and an expensive preparation for the bar exam. This leaves today's average law-school graduate with $100,000 of debt on top of undergraduate debts. Law-school debt means that they have to work extremely hard.

    Reforming the system would help both lawyers and their customers. Sensible ideas have been around for a long time, but the state-level bodies that govern the profession have been too conservative to implement(实施)them. One idea is to allow people to study law as an undergraduate degree. Another is to let students sit for the bar after only two years of law school. If the bar exam is truly a strict enough test for a would-be lawyer, those who can sit it earlier should be allowed to do so. Students who do not need the extra training could cut their debt mountain by a third. The other reason why costs are so high is the restrictive guild-like(行会) ownership structure of the business. Except in the District of Columbia, non-lawyers may not own any share of a law firm. This keeps fees high and innovation slow. There is pressure for change from within the profession, but opponents of change among the regulators insist that keeping outsiders out of a law firm isolates lawyers from the pressure to make money rather than serve clients ethically.

    In fact, allowing non-lawyers to own shares in law firms would reduce costs and improve services to customers, by encouraging law firms to use technology and to employ professional managers to focus on improving firms' efficiency. After all, other countries, such as Australia and Britain, have started liberalizing their legal professions. America should follow.

Dawn Loggins of Lawndale, N. C. is on her way to Harvard, one of the eight world­famous universities in the eastern US. Nobody encouraged her to study or paid for her special classes. This girl created her own future.

The teen was abandoned by her family last summer, when her parents and two sisters moved to Tennessee. She found herself homeless and had to spend the night on friend's sofas.

The school bus driver learned about Dawn's situation and invited Dawn to move in with her family. Soon, Dawn had a job at Burns High School. She worked from 6 a. m. to 7：40 a. m. before the first school bell rang. She swept floors and picked up trash again in the afternoons, before diving into her studies in the evenings.

Dawn's hard work paid off. She finished school with a 3. 9 GPA and scored 2, 110 on the SAT.

"There were times when I felt like it would be easiest if I gave up," the 18­year­old said." But it was never in me to give up, because I realized that I was never going to be successful unless I got an education."

Even before Dawn's family left her, she led a difficult life. Her family was poor and cups of noodles were often the only food. Dawn" studied by candlelight" because her parents couldn't afford to pay the electricity bill(电费).

Dawn has now reconnected with her family. They are proud of her accomplishments(成就)and are attending her high school graduation.