打印本文 打印本文  关闭窗口 关闭窗口  
Why suitcases rock and fall over – puzzle solved 科学家解开拉杆箱摇摇欲倒的物理谜题
作者:BBC  文章来源:BBC ELT News  点击数56  更新时间:2017/7/2 9:27:43  文章录入:刘老师  责任编辑:liu

Why suitcases rock and fall over – puzzle solved 科学家解开拉杆箱摇摇欲倒的物理谜题

Why suitcases rock and fall over – puzzle solved 科学家解开拉杆箱摇摇欲倒的物理谜题

文字稿

相信很多人都对下面的这个情景深有体会:为了赶火车或飞机,我们费力地拖着一个两轮拉杆箱向前奔跑,而箱子会左右摇晃,眼看着就要翻倒,着实让人提心吊胆。现在,科学家们已经针对这个令人费解的日常物理难题展开了研究调查,结果他们发现,避免该现象的方法可能和我们的预期有所不同。请听报道。?

It’s a common experience when dashing for a train while lugging a two-wheeled suitcase, the bag rocks alarmingly from side to side and threatens to overturn.

To explain why this happens, French researchers studied a model suitcase on a treadmill and did some number-crunching. And it turns out, that rather than slowing down, as you might expect, you should actually speed up to tame your unruly suitcase. ?

Scientists say, while it’s a fun way to tackle the problem, the study could have applications with other two-wheeled things from trailers to caravans.?

词汇表

dashing?猛冲,突然奔跑
lugging?用力拖着
two-wheeled?两轮的
suitcase?行李箱,这里指拉杆箱
rocks?摇晃,摇摆
alarmingly?令人惊慌地,让人担忧地
from side to side?左右、来回地
threatens?预示着、快要发生(不好的事情)
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. 

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

打印本文 打印本文  关闭窗口 关闭窗口