他总是为自己的体重发愁。

He's always worrying about his weight.

《牛津词典》

她为钱发愁，许多夜晚无法入睡。

Financial worries cost her many sleepless nights.

《牛津词典》

要是我坐在家里为所有这些事发愁，我会发疯的。

If I sat home and worried about all this stuff, I'd go crazy.

《柯林斯英汉双解大词典》

One of the advantages of this is, that I don't have to worry about explicitly updating my variable. That happens for me automatically.

这样继续下去，这样做的一个优点是,我不用为更新变量来发愁了,程序会自动的为我进行这个操作，这一点很好。

麻省理工公开课 - 计算机科学及编程导论课程节选