overturn 翻倒

treadmill 跑步机

number-crunching （人或计算机进行的简单而耗时的）数字运算

tame 控制，驾驭

unruly 难控制的，难驾驭的

applications 用途，应用

trailers （卡车后的）挂车

caravans （尤指用汽车拖着走的）旅行房车 

测验 请听报道并回答下列问题。

1. What did French researchers do to explain the suitcase puzzle? 

2. What applications could the study have, according to the scientists? 

3. True or false? To control our suitcases, we should speed up rather than slow down. 

4. Which word in the text means ‘to deal with something difficult with determination’?

答案 1. What did French researchers do to explain the suitcase puzzle?

To explain the suitcase puzzle, French researchers studied a model suitcase on a treadmill and did some number-crunching.

2. What applications could the study have, according to the scientists?

The study could have applications with other two-wheeled things from trailers to caravans, according to the scientists.

3. True or false? To control our suitcases, we should speed up rather than slow down.

True. It turns out that rather than slowing down, as we might expect, we should actually speed up to tame our unruly suitcases. 

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