There's a good chance that something you've bought online has been in the hands of a " picker". These are the workers in warehouses (仓库) who pick, pack and ship all those things we ordered.

At Amazon and other companies, they're working side by side with robots. Experts say while the robots are replacing some human workers, the machines aren't quite ready to take over completely.

When a robot finds its storage unit,' it slides underneath, lifts it up and then delivers it to a worker they're called pickers. On a recent day, the computer told a picker to grab what looked like a fantasy board （#t 3#)game. The picker found it, packed it and placed it on the conveyer belt.

"In a traditional fulfillment center where the workers would walk to the different items, it can take hours to fulfill a customer order," Robinson says.

Now, with the help of robots, that task takes minutes and fewer humans.

So is this a sign that we're entering a new industrial revolution?

" It's definitely going to take over a lot of jobs ", says Karen Myers, a scientist at SRI, one of Silicon V alley's oldest research centers.

At the same time, she says, " We're running against the limits of technology. " Take the picker at the Amazon fulfillment center for example. Myers says those skills prove to be uniquely human.

"Our fingers are incredibly flexible and the current generation of robotic operators are getting much, much better," she says. "But they're just not quite there yet."

There's also the robot's brain.

Remember that board game the Amazon worker was looking for? She could barely see the box when it was filled into the storage bin——but she could tell it was a board game. Robots can't do that.

Technologists say that, increasingly, humans will work side by side with robots——instead of robots working alone.

Amazon says robots and humans enabled the Tracy warehouse to fulfill customer orders faster. That means more customers and more human workers.

   At home, ordering food from a menu is a normal routine, I don’t even give it a second thought. In China, it’s a whole other story! Here, ordering is a fun game of test and error, and the adventure begins before the food is even served!

Many restaurants in central Beijing advertise “English language menus”, but the translations can just add to the confusion. Although accompanying pictures can be a helpful relief, the translations often make the whole experience even more amusing. During my first few weeks in China I tried some delicious dishes with strange names. As an experiment, my friends and I would order things like “students addicted to chicken gristle（软骨）” and “red burned lion head”. Eventually we learned that “lion head” was actually pork, and “students” were “addicted” to diced（切成丁的）chicken with green pepper. Recently, I came across a busy restaurant down a narrow side street in a Beijing hutong. It was lunchtime and the small room was packed with people sitting on small stools eating noodles. I was hungry and cold, and the steaming bowls looked irresistible! I sat myself down and called out for a “caidan!” In response, the waitress pointed to a wall at the back of the restaurant. The wall was full of Chinese characters describing numerous dishes. There was only one sentence in English: “crossing over the bridge noodles”.

I had never heard of the dish and had no idea what it would taste like. I took a gamble and ordered one bowl of “crossing over the bridge noodles”. A few minutes later the waitress carried a heavy bowl full of broth（肉汤）and I quickly dug in. It was the best bowl of noodles I had ever tasted! I have been back again and again and each time I point at the one English sentence—“crossing over the bridge noodles”. I always enter a restaurant in China feeling excited and a little nervous. Who knows what the next ordering adventure will show?

Reducing Test Anxiety

Test anxiety arises when a student excessively worries about doing badly in a test. This can become a major hindrance (造成妨碍的事物) to test performance and cause extreme nervousness and memory problems among other symptoms. 【小题1】

Think positively. Scientific research has shown that our expectations can affect our performance. 【小题2】However, if you expect that you’ll do poorly, studying may not be enough to help you perform well. Therefore, it is a wise choice to think positively.

【小题3】 Fear releases adrenaline (肾上腺素) , preparing the body to deal with danger. Your heart rate and breathing speed up and you may feel shaky, sweaty, or dizzy. Anything you can do to reduce these physical reactions will help you think more clearly and feel more confident.

Eat before the test. Don’t skip breakfast to study. 【小题4】 Choose protein-filled snacks and avoid sugar, which can give you quick energy that may run out in the middle of the test. Eat something even if you feel sick—try crackers or toast to settle your stomach. Avoid caffeine and energy drinks, which can increase anxiety.

Get a good night’s sleep before the test. Studies have shown that you will do well in the test if you get enough sleep. 【小题5】 If the test is later in the day or the evening, or if you just couldn’t get a full night’s sleep, take a nap. Research has shown that a short nap—less than an hour—can improve alertness, memory, creativity,  productivity, and moods, and can decrease stress.