keep your chin up 别灰心，别气馁，保持斗志

　　You'll have a better day tomorrow. Just keep your chin up.

　　明天你会好起来的，别灰心！

　　I know this is hard for you, but try to keep your chin up.

　　我知道这对你一定是有困难，但别灰心！

　　疯狂练习吧！