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1，a change of pace 节奏变换
You can’t do these chemistry experiments all day long. You certainly need a change of pace.
2, a far cry from 相距甚远
The published book is far cry from the early manuscript.
3, and how 的确
A: She’s a good dancer.
B: and how.
4, a matter of time 时间问题
It is only a matter of time.
5, a phone call away 一个电话之远，愿意过来帮忙。
If you need my help, do let me know. Just remember I am a phone call away.
6, a while back 不久以前
7，all along 一直
I knew it all along.
8, anything but 不
I was anything but happy about going.
9, account for 解释
How do you account for it?
10, after all 到底
A: I’ve just seen the X-rays and your teeth look just fine,
B: I see. Then there is nothing to worry about after all.
11, allergic to 对……过敏
Oh man! Something in this room is making my eyes itch. I must be allergic to something.
12, at sb’s service 愿为某人服务
I am at your service at any time.
13, around the clock 24小时不停
Martha studied around the clock for management exam.
14, as far as I know 就我所知
15，at home with 对…..很熟悉
She is at home with problems like this.
16, back out
1) 退出
A: Wasn’t Bert supposed to sing tonight?
B: Yes, but he backed out at last minute
2)不履行
She finally backed out of her promise.
17, be cut out for 天生适合
I’m not cut out to be a hero.
18, be absorbed in
She has been absorbed in a horror fiction. I can’t tear her away.
19, be addicted to 对……上瘾
She has been addicted to drugs for years.