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.

　　： 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，

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