1、prevent

防止；预防；阻止

These methods prevent pregnancy.

这些方法能防止怀孕。

Further treatment will prevent cancer from developing.

进一步的治疗将阻止癌症恶化。

阻止；制止；阻碍

He said this would prevent companies from creating new jobs.

他说这将使公司无法创造新的工作机会。

Its nationals may be prevented from leaving the country.

其国民可能会被禁止出境。

2、confuse

混淆;搞错

Great care is taken to avoid confusing the two types of projects.

大家非常谨慎，以免把这两类项目弄混。

I can't see how anyone could confuse you with another!

我不明白怎么会有人把你和另外一个人搞混！

把…弄糊涂;使困惑

German politics surprised and confused him.

德国政治既令他惊讶，又让他困惑不解。

搅乱;使复杂化

To further confuse the issue, there is an enormous variation in the amount of sleep people feel happy with.

使问题进一步复杂化的是，每个人需要的睡眠时间千差万别。