1.be in the way/be in sb's way 碍着了
例句：Sorry, am I in your way?
对不起，我挡着你路了吗？
get out of the way 别碍着

2.need/want a hand doing 做……需要帮手
give/lend (somebody) a hand 帮助某人
I could do with a hand/use a hand 有帮助会好些
例句：Countries want a hand up, not a hand-out.
各国需要的是帮助，而不是施舍。

3.go over
1.仔细想一下
2.仔细搜查一下
3.重复来仔细解释一遍
4.打扫一遍
例句：They went over their lessons together at night.
他们晚上在一块复习课文。
go over big/well 人们很喜欢

4.a backup plan=Plan B 备用计划
a backup generator 代替发电机
Make a backup 做备份
A backup team 后备军
例句：Drazen informs Carroll that he won't be needed since a backup plan is already in effect.
安德烈告知凯文，那没有必要，因为一个备用计划已经开始实施了。