I don't think anything's going to cheer me up.

我认为没有什么事能使我高兴。

Hang in there ， just cheer up . Give it another try .

坚持下去， 振作起来。 在试一次。

Come on， cheer up! You look like a dying duck I a thunder storm.

来， 振作起来， 你看上去一副愁眉苦脸的样子.