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.
