I was too cowardly to complain.

我胆小得都不敢抱怨。

《柯林斯英汉双解大词典》

All she ever does is complain.

她就会抱怨。

《柯林斯英汉双解大词典》

Then they had the gall to complain!

而且他们居然还有脸抱怨！

《牛津词典》

His mostly-sunni critics complain that Iraqi forces are not ready to assume the task.

VOA: standard.2009.06.01

Republicans assert the legislation will lead to federal government control of the health care system, higher costs and deficits and debt, and bitterly complain about Democrat's plan to pass the Senate-approved bill without a direct vote, by packaging it with a separate measure of changes.

VOA: standard.2010.03.19

That is not to complain - long hours and long absences from home go with the job.

BBC: Nicol Stephen resignation in full

But Tyler and Roseanna never complain -- as none of you do.

WHITEHOUSE: Mother's Day Tea at the White House

The Pew Internet and American Life Project found that 25% of e-mail users complain the ever-increasing volume of unwanted and often offensive e-mail has reduced their overall use of e-mail, and more than half of those say the decrease is significant.

FORBES: Magazine Article