You'd better not go inside. There might be snakes.

你最好不要进去。说不定有蛇呢。

Just a minute. She's taken the bag that usually sits on top of the cupboard.

等等。她带走了通常放在壁橱顶上的包。

Thus one simple fact, a change in the number of bison, had an effect on the whole wildlife chain of the plains.

因此，出现了这样一个简单的事实--野牛数目换的变化对平原的整个野生生物链都产生了影响。

At lunchtime, the tourist thanked him and gave him ten pounds, which was a lot of money in those days.

午餐时，这位游客向他表示感谢，并给了他10英镑。这在当时可算是一大笔钱了。

It is much cheaper to post or email a long report than to fax it.

邮寄或电子邮递一封长篇报告比传真要便宜得多。

Over the next thirty-two years he fought for human rights and the rights of workers who were badly treated by their employers.

在后来的32年多的时间里，他一直为争取人权及那些受雇主虐待的工人们的权利而斗争。