11、 allergic to 对|……过敏
　　
Oh man! Something in this room is making my eyes itch. I must be allergicto 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.