Try to be cheerful now; the travelling is at an end, and you have nothing to do but rest and amuse yourself as you please.

现在要极力高兴起来；旅行已经结束了，你没有什么事要做就歇着，爱怎么就怎么吧。

youdao

If you are coming to the garden party, please try to be a bit more cheerful. I don't want you standing around looking like a wet weekend.

如果你来参加游园会的话，请尽量高兴一点，我希望你不要愁眉苦脸地闲站在那儿。

youdao