at a time 每次,一次 The people came in two at a time.

　　at no time 从不,决不

　　at one time 曾经,一度; 同时 At one time I used to like her, but not any more.

　　at the same time 同时; 然而,不过 He can be very rude, but at the same time I cant help liking her.

　　at times 有时 =sometimes

　　for the time being 目前,暂时 Ill let you keep the book for the time being.

　　from time to time 时常 He comes here from time to time.

　　in no time 立即,马上 Ill be back in no time.

　　take ones time 不急不忙,从容进行

　　on top of 在 之上 He lost his job and on top of that his wife left him.

　　keep in touch 保持联系 Please write, it would be nice to keep in touch.

　　out of touch 失去联系 Id like to go back to teaching, but Im out of touch with my subject now.

　　touch on 关系到.涉及 In his talk he touched on the state of affairs in Africa.

　　touch up 润色,改进 =improve by making small changes or additions

　　keep/lose track 通晓事态,注意动向

　　失去联系 =keep/not keep oneself informed about a person, state of affairs,etc

　　in (all)

　　truth 事实上,的确 =in fact; really

　　In all truth ,he is a excellent teacher.

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