1.stay away from 远离

例句:He told his children to stay away from dangerous electrical things.
他叫他的孩子们不要接近危险的电器。

2.at a time 一次；每次

例句:Can I borrow two books at a time?
我能一次借两本书吗？

3.in power 执政的；掌权的

例句:How long should a President be allowed to remain in power?
一位总统应该让他在职多久呢？

4.as well as 也；和...一样

例句:Boys as well as girls are taught cookery in school these days.
现在学校里男女学生都学烹饪。