Don't mention it. 不必客气。 Don't miss the boat. 不要坐失良机。 Don't take any chances. 不要心存侥幸。 Don't take it for granted. 不要想当然。 Don't worry about it. 别担心。 Easy come,easy go. 来得容易,去得快。 Enjoy your meal. 请慢慢享用吧。 Easier said than done. 说是容易做时难。 First come,first served. 捷足先登。 For here or to go? 再这儿吃还是带走? Forget it. 算了吧。 Forgive me. 请原谅我。 Give me a call. 给我打电话。 Give my best to your family. 代我向你们全家问好。 Have him return my call. 让他给我回电话。