What is the first thing you notice when you walk into a shop? The products displayed(展示) at the entrance? Or the soft background music?

    But have you ever notice the smell? Unless it is bad, the answer is, likely to be no. But while a shop's scent may not be outstanding compared with sights and sounds, it is certainly there. And it is providing to be an increasing powerful tool in encouraging people to purchase.

    A brand store has become famous for its distinctive scent which floats through the fairly dark hall and out to the entrance, via scent machines. A smell may be attractive but it may not just be used for fresheningair. One sports goods company once reposed that when it first introduced scent into its stores, customers' intension to purchase increased by 80 percent.

    When it comes to the best shopping streets in Pairs, scent is justas important to a brand's success as the quality of its window displays and goods on sales. That is mainly because shopping is a very different experience to what it used to be.

    Some years ago, the focus forbrand name shopping was on a few people with sales assistants' disproving attitude and don't-touch-what-you-can't afford displays. Now the rise of electronic commerce(e-commerce) has opened up famous brands to a wider audience. But whilee-shops can use sights and sounds, only bricks-and-mortar stores(实体店) can offer afull experience from the minute customers step through the door to the moment they leave. Another brandstore seeks to be much more than a shop, but rather a destination. And scent is just one way to achieve this.

     Now a famous store uses complex man-made smell to make sure that the soft scent of baby powder floats through the kid department, and coconut(椰子) scent in the swimsuit section. A departmentstore has even opened a new lab, inviting customers on a journey into the store's windows to smell books, pots andd rawers, in search of their perfect scent.

    China is a land of bicycles.At least it was back in 1992 when I traveled the country.Back then everyone seemed to be riding a bicycle.Cars were fare.Yet since my arrival in Beijing last year,I've found there are millions of cars. However,bicycles are still popular nowadays.People still use their bicycles to get around.For many,it's the most convenient and cheapest way to travel today.

    It's rush quickly through crossroads,move skillfully through traffic,and ride even on sidewalks（人行道）. Bicycles allow people the freedom to move about,which cars just can't provide.Eager to be part of this aspect of Chinese culture,I decided to buy a bicycle.Immediately I got my new bike I jumped up on the seat and started home.

    My first ride home was orderly（守秩序的）.To be safe, I stayed with a "pack" of bikers while cars on the streets came running swiftly out of nowhere at times.I didn't want to get hit.So I took the ride carefully.Crossing the streets was the biggest problem.It was a lot like crossing a major highway back in the United States.The streets here were wide,so crossing took time,skill and a little bit of luck.

    I finally made it home.The feeling on the bicycle was amazing.The air hitting my face and going through my hair was wonderful.I was sitting on top of the world as I passed by places and people.Biking made me feel alive.

    My three-year-old granddaughter, Tegan, went with her parents to a family gathering at the home of her other grandparents. Everyone was having a wonderful time visiting and catching up on all the latest family news.

    Like most children, Tegan was having a good time playing with all the toys that were different from her own and that were kept for children to play with at her grandparents' house. In particular, Tegan had found a little tea set and had begun pretending that she was having a tea party. She set up all the place settings and arranged her table with the great care and elegance that only a three-year-old can create. Meanwhile, her Daddy concentrated on conversation, and as he continued to chat with his family, Tegan would hand him a cup of "tea". Her Daddy, who always tries to participate in her games, would pause for a few seconds from his conversation, and say all the proper words and gestures for her tea party which would thrill Tegan. He would request two lumps of sugar. He would tell her how wonderful her tea tasted, and then he would continue his adult conversation with his family.

    After going through this routine several times, her Daddy suddenly awoke to reality as he had a flash of concern in his mind: "She is only three years old, where is she getting this 'tea' that I've been dutifully drinking?" He quietly followed her, without her knowing, and his fears were growing stronger as he saw her turn and go through the bathroom door. Sure enough, there she was stretching up on her tippy toes reaching up to get her 'tea' water out of the container of water that grandpa used to soak (浸泡)his false teeth!

    Dodder is an unusual and unwanted plant that attacks other plants. Except for its flowers, the plant looks like spaghetti, a kind of noodles in the shape of long thin pieces that look like string when they are cooked. It's almost leafless, thread-like stems hang down on top of other plants that dodder needs to stay alive. Dodder does not produce its own food. Instead, it steals food from other plants. It feeds by sucking juices from the plant which is wrapped around, often making its host very weak or even killing it.

    Dodder can find other plants by their smell. When a young dodder plant starts growing, it follows the smell of plants it prefers, like tomato plants, potato plants, or other farm crops. Unlike most plants that usually grow in the direction of light or warmth, a dodder plant will grow in the direction of, for example, tomato smell—if a tomato happens to be growing nearby.

    However, a young dodder plant must find a host plant quickly. It no longer needs its root once it is attached to the host and wrapped around it. If it cannot catch a smell of a potential host within a few days, it will dry up and vanish even if there is plenty of water around. Once it finds a host, the young dodder plant will attach itself to it and start growing faster. At that point the dodder plant will drop its root.

    Dodder is thus a difficult weed to manage and a real headache for farmers. When it does get out of hand, dodder can greatly reduce a farmer's harvest or even destroy crops completely. Before sowing their produce, especially farmers in warm parts of the world often check to make sure no unwanted dodder seeds have mixed with their crop seeds. This is a good way to stop dodder plants from making their way to a crop field secretly.

AFTER AMAZON ECHO MISFIRE, WAYS TO PROTECT YOUR OWN PRIVACY

    Revelations that an Amazon Echo smart speaker accidentally sent a family's private conversation to an acquaintance highlights some unexpected privacy risks of new voice-enabled technologies. There's no way to totally avoid these sorts of privacy risks except unplugging them entirely, but you can minimize the unpleasant privacy surprises with these tips:

    KILL THE MIC: Most smart speakers have a physical button to disable the microphone, so a private conversation can't be recorded to begin with. You can hit that when you're having sensitive conversations. It doesn't make sense to keep the mic disabled throughout the day, though.

    LIMIT THE MIC: Disabling the microphone isn't practical on a smartphone, but you can limit what apps have access to it. Go to the settings and turn off mic access to all but essential apps such as voice recorders or video conferencing.

    ABOUT THAT CAMERA: Facebook CEO Mark Zuckerberg famously puts a piece of tape over his laptop's camera to prevent spying if anyone were to hack his device. Buy yourself a roll. Or use bandages. If you have a home-security camera that's connected to the Internet, turn the camera to the wall when you're home.

    BLOCK THE SIGNALS: For smartphones and other gadgets you carry with you, a "Faraday bag" can help prevent unwanted spying. The good ones will block cellular and other signals, meaning privacy-compromising information such as your location won't leak out either. However, your phone won't get any calls while it's in the bag.

    Of course, the safest approach is not to buy a new gadget in the first place. That might not be practical these days, but do you really need a smart speaker or a television set that's connected to the Internet?

    War can be deadly for wildlife, too. A new study reports that war is the biggest threat to Africa's elephants, rhinoceroses, and other animals. Researchers examined how years of conflict in Africa have affected populations of large animals. More than 70 percent of Africa's protected wildlife areas have been within a war zone at some point in the last 70 years. The more frequent the fighting, the greater the drop in animal populations, said Josh Daskin, an ecologist at Yale University. He was the lead author of the study, which was published Wednesday in the journal Nature.

    It takes very little conflict, as much as one conflict in about 20 years, for the average wildlife population to be declining, Daskin said. "Areas with frequent fighting — but not necessarily the bloodiest fighting—lose 35 percent of their large animal populations during each year of war," he said.

Some animals get killed by weapons of war. Yet, many also die because of changes in social and economic conditions in an area as a result of war, said Rob Pringle. He is an ecologist at Princeton University and the study's co-author. "People in and around war zones are poor and hungrier. So they may begin to illegally hunt animals for valuable tusks or hunt protected animals to eat," Pringle said. "And during wartime, animal conservation programs do not have as much money or power to protect wildlife."

    The new study examined the entire African continent over 65 years. The researchers looked at 10 different factors that could change population numbers. They included war, drought, animal size, protected areas and human population density. The number of wars had the biggest effect on wildlife population. The intensity of the wars — measured in the number of human deaths — had the least effect on animals.