You were very angry!

你火气真大！

And I can't find her passport anywhere. So she must have taken that too.

而且我在哪都找不到她的护照，所以她一定也带去了。

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。

He tried to escape but was followed and caught.

他曾经试图逃跑，但是被人追上来抓住了。

When there is no one in the office, you can leave the answering machine on so that people who call you up can leave a message.

当无人在办公室时，你可以打开留言机，这样打电话给你的人就可以留言了。

Once the oxygen content of the air had risen to 25% it was ready to burn.

一旦氧气在空气中的含量达到25%，它就要燃烧。