【英语时差8,16】墨西哥跳豆为什么会跳跃（上）

On the table in front of you, it looks like a small, dried bean. Pick it up. To your surprise, it starts to wiggle, shifting around nervously¹ in your palm. Suddenly, it squirms back onto the table again. We’ve all heard stories about Mexican jumping beans. What are they, and how do they do that remarkable² trick? Actually, jumping beans aren’t beans at all. They are the seed pods of a certain shrub³ that grows in the rocky desert areas of northern Mexico and the American southwest. These seed pods can’t jump by themselves. What makes a jumping bean so jumpy is the larva of a small grey moth⁴ that has burrowed⁵ inside the seed pod and eaten the seed.

1 nervously   

adv.神情激动地，不安地

参考例句：

• He bit his lip nervously,trying not to cry.他紧张地咬着唇，努力忍着不哭出来。
• He paced nervously up and down on the platform.他在站台上情绪不安地走来走去。

2 remarkable   

adj.显著的，异常的，非凡的，值得注意的

参考例句：

• She has made remarkable headway in her writing skills.她在写作技巧方面有了长足进步。
• These cars are remarkable for the quietness of their engines.这些汽车因发动机没有噪音而不同凡响。

3 shrub   

n.灌木，灌木丛

参考例句：

• There is a small evergreen shrub on the hillside.山腰上有一小块常绿灌木丛。
• Moving a shrub is best done in early spring.移植灌木最好是在初春的时候。

4 moth   

n.蛾，蛀虫

参考例句：

• A moth was fluttering round the lamp.有一只蛾子扑打着翅膀绕着灯飞。
• The sweater is moth-eaten.毛衣让蛀虫咬坏了。

5 burrowed   

v.挖掘（洞穴），挖洞( burrow的过去式和过去分词 )；翻寻

参考例句：

• The rabbits burrowed into the hillside. 兔子在山腰上打洞。 来自《简明英汉词典》
• She burrowed her head into my shoulder. 她把头紧靠在我的肩膀上。 来自辞典例句