Moping won't do any good!

自怨自艾一点用处都没有！

Life's too short to sit around moping.

人生很短，不能整天坐在那儿自寻烦闷。

Instead of moping around the house all day, you should be out there looking for a job.

不要整天闷闷不乐地在家里晃悠，你应该出去找份工作。

Now jump up, there's a good fellow, and don't lie moping there on a fine morning like this!

快跳起来吧，好小伙儿，这么好的早晨，别愁眉苦脸地躺在那儿！

In the afternoon Becky Thatcher found herself moping about the deserted schoolhouse yard, and feeling very melancholy.

那天下午，贝基·撒切尔在空无一人的学校操场上踱来踱去，觉得很凄凉。