1. I need it in a big hurry.

这个半点都不能延误。

还能这样说：

I need it badly.

I need it in a flash.

应用解析：

in one's hurry 匆忙之中;

tearing hurry 火急火燎;

hurry to get away 匆忙脱身

2. Get going!

快点干!

还能这样说：

Get the lead out!

Get on with it!

应用解析：

get so far with it 进行到这种程度;

get even with sb. 和某人算帐

3. This is a rush job.

这事可是刻不容缓的。

还能这样说：

The job is in badly needed.

The job is urgent.

应用解析：

rush of city life 繁忙的都市生活;

make a rush at sb. 向某人冲去;

with gold rush 淘金热

4. What's keeping you? Hurry up.

你怎么耽搁了?快点儿!

还能这样说：

Be quick! Don't hold up.

It can't be delayed, hurry up.

应用解析：

keep on at 纠缠不休，继续不断地抱怨;

keep back one's tears 忍住泪