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 a far cry from the early manuscript.

3.keep (one's) eye on the ball 专注于某件事
I graduated in just three years because I was able to keep my eye on the ball and prioritize my studies above all else.

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
We had a good rain a while back, but we need more now.

7.all along 一直
I knew it all along.

8.anything but 绝对不
I was anything but happy about going.

9.account for 解释，说明（原因、理由等）
How do you account for it?

10.after all 到底，毕竟
I see. Then there is nothing to worry about after all.