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    About three hours after Hurricane Harvey made landfall in Texas as a Category ( 级 别 ) 4 storm, it was downgraded to a Category 3 storm after winds decreased to 125 mph from maximum winds of 130 mph.

    Harvey also made a second landfall on the northeastern shore of Copano Bay around the time it was downgraded.

    The storm is the strongest to hit the state in decades, with serious flooding expected. The last Category 4 storm to hit the U.S. was Charley in 2004 in Florida, while the last Category 4 storm to hit Texas was Carla in 1961.

    Residents staying in the area madly stocked up on(备足) food, water and gas, while others heading out of the storm's path boarded up windows and doors of their homes and businesses.

    Airlines canceled flights, schools were closed while concerts and other planned events in Houston and coastal cities were postponed.

    The hurricane's effects are expected to last for days, with heavy rainfall through next week estimated to be as high as 40 inches in some areas.

    The National Weather Service warned Harvey could bring a potentially destroying storm surges( 风 暴 潮 ), heavy rainfall and wind hazards( 危 害 ) to the Lone Star State's coast. A tornado watch is in effect for areas of southeastern Texas and southwest Louisiana.

    Life-threatening storm surge waters could reach 9 to 13 feet above ground level. Destroying flooding is expected across parts of the area. And rainfall will be heavy, with an estimated 15 to 30 inches of rain falling in many areas and as high as 40 inches in some from today through Wednesday, the National Weather Service said.

    A little boy discovered what looked like a map to an unknown place. He soon realized it was the beginning of an exciting treasure hunt.

    He found two pieces of paper along with the mysterious map. One was written with the instructions, “FIND THE WORDS.” The other piece of paper had several strange symbols scattered all over it.

    Dad, fortunately, was there to help his son figure out the mystery. He folded up the paper with the symbols on it, and together they formed a message, which had another set of instructions, “UNDER STEPS.” The smart little boy knew exactly what to do so he went to look under the steps of his house. Without too much effort, he found a box below the staircase.

    It didn't take him long to figure out what to do next: open it up! Inside the box were some very interesting objects, including another piece of a treasure map and two broken pieces of paper. These were the most interesting finds because they contained what appeared to be a collection of letters on them. Finally, they knew where the treasure was from the letters: IN THE BUSH UNDER YOUR YARD.

    After searching all over the yard, following several clues and wondering where everything would lead, the pair finally found what they had been looking for. And it was exactly what you would want after such an adventure: a treasure box!

    The pair pulled it out of the ground and cleaned away all the dirt. The dad put the box in front of his son, and the little boy couldn't contain his excitement. So he opened it up and finally found out what was inside.

    Inside was more treasure than any little boy could ever want. There were hundreds of coins and all sorts of pirate treasure, including what looks like a pearl necklace and some silver dishes.

    Have you ever noticed what happens to an idea once you express it? Just talking about it or writing it down causes you to make it clear in your own mind. How can you use this to increase your brain power? Start writing.

    By putting thoughts into words, you are telling yourself the logic（逻辑）behind what you think, feel, or only partly understand. Often, explaining a thought is the process of understanding. In other words, you increase your brain power by exercising your “explain power.”

    Try this experiment. Explain how you'll increase your brain power, even if you have no idea right now. Just start with anything, and create an explanation. For example, start with “I'll learn chess,” or “I'll read an article on the mind every week.” Explain how that will help. You'll be surprised how often this becomes a workable plan, and if you actually do this, you'll have a better understanding of your brain from now.

    Another benefit of writing is that it helps you remember. Many, if not most, highly productive people are always taking notes. You can try keeping it all in your head, but if you keep a journal of your ideas the next time you're working on a big project, you'll probably have more success.

    Want to understand a topic? Write a book about it. That's an extreme example, but if you are learning something new, write a letter to a friend about it, and you will understand it better. Want to invent something? Write an explanation of the problem, why you want to solve it, and why it is worth solving, and you're half-way there.

    Writers don't always write because they clearly understand something beforehand. Often, they write about something because they want to understand it. You can do the same. Writing will help bring you to an understanding. Give it a try.

    One of the most important things in the world is friendship. In order to have friends, you have to be a friend. But how can you be a good friend at school？

Listen﹣Listen when they are talking. Don't say anything unless they ask you a question. Sometimes it's not necessary for you to have anything to say; they just need someone to talk to about their feelings.

    Help them﹣If your friend is ever in need of something, be there to help them. You should try to put them first, but make sure you don't do everything they want you to do. Try to take an extra pencil or pen with you to classes in case they forget one. Have a little extra money in your pocket in case they forget something they need.

    Be there for them﹣Be there for your friends to help make them feel better in hard times. Marilyn Monroe, a famous U.S. actor, once said, "I often make mistakes. Sometimes I am out of control, but if you can't stay with me at my worst, you are sure not to deserve to be with me at my best." Always remember this! If you don't want to stay with your friends when they're in hard times, then you don't deserve to be with them when they're having a good time!

    Make plans﹣Try to make plans with your friends. Go shopping, go for ice cream, have a party, go to a movie and so on. Take time to know each other even better by doing something you both enjoy. By planning things together, you both can have a good time. And you'll remember these things when you're all old!

    Moscow city authorities have begun using comics (漫画) with characters from Russian fairy tales to explain to migrants (移民) how they should behave. They say a 100-page guide is needed to "keep a positive image" of the city and could help reduce "tensions" between natives and migrants. But critics have pointed out that foreign migrants and natives may be regarded as antagonists in the manual (手册).

    Russians and migrants have repeatedly flooded in Moscow recently. Many migrants from ex-Soviet republics in Central Asia, the Caucasus (高加索) and North Caucasus, arrive in Moscow every year, attracted by the capital's job opportunities and relatively high salaries. A significant number of them work in the Russian capital illegally.

    The new guide in Russian seeks to explain the "dos" and "don'ts" to migrants. They are urged not to cause trouble, by staring at women, or eating or talking loudly on the streets. They are also warned that the police may routinely (例行公事) stop them to check their documents.

    In the manual, Russia's famous "three warriors" are meant to represent the city's law enforcement agencies (执法机关), while Prince Yuri Dolgoruky (a historical character) is used for tours around Moscow. Meanwhile, Vasilisa the Wise and The Snow Maiden test the reader on Russia's language and history. A special section of the book explains the importance of following Moscow's strict residency and employment rules, stressing that migrants could otherwise be deported (驱逐出境) or banned from entry.

    The manual was written primarily for illegal migrants, Alexander Kalinin, who heads the group Support for Working Migrants in Moscow, told BBC Russian.

    "We want to raise their level of law awareness," he added.

    Migrant characters had initially (最初) been identified as representatives of different nationalities, but the book's authors later decided to drop this idea so as "not to offend anyone", said Mr. Kalinin.

    "The old conflict between Russian heroes and non-Slavic invaders is being revived," Yevgeny Varshaver, a migration expert told BBC Russian. He also suggested that the language used in the book would be "difficult" to understand for some migrants who were not native Russian speakers.

    Being able to take advantage of truly unlimited data is a smartphone user's dream, but everyone I've talked to about 5G is more excited about the usage unlocked by next - generation wireless devices. From smart home security to self - driving cars, all the Internet - connected equipment in your life will be able to talk to each other at lightning - fast speed with reduced delay.

    "5 G is one of those forerunners, along with artificial intelligence, of this coming data age," said Steve Koenig, senior director of market research for the Consumer Technology Association. "Self - driving vehicles are emblematic in this data age - they show application of data completely. With one single task, driving, you have large amounts of data coming from the vehicle itself, and a variety of sensors (传感器)are collecting a lot of information to model its environment as it moves. It's pulling in data from other vehicles about conditions down the road. There's lots of data behind that task, which is why we need the speed and lower latency ((延迟).

    AR glasses and virtual (虚拟的)reality headphones haven't yet been inside the mainstream, but tech companies are joyfully saying that such equipment will eventually replace our smartphones. With 5G, that could actually happen. This is notable because companies such as Apple are reportedly developing AR glasses to improve - or even replace - smartphones.

    Ericsson showed at February's Mobile World Congress in 2019 how smart glasses could become faster and lighter with a 5G connection, because instead of being weighed down with components, the glasses could rely on outside equipment for processing power.

    But don't get too excited. There's still a lot of work to be done in the meantime, including some necessary testing to make sure the radio plays nicely with basic systems and service construction so that 5G isn^'t concentrated only in big cities.