For once, Dad is not complaining.

就这一次，爸爸没有抱怨。

《柯林斯英汉双解大词典》

But they are not complaining.

但他们没有任何抱怨。

youdao

So I'm not complaining; I'm asking.

所以，我并不是抱怨，我是在请求。

youdao

Our District Directors haven't brought this news, extension officers are not complaining, nobody has gone to complain.

VOA: standard.2009.08.23

Harbour said the security software sector has a long way to go, but he's not complaining.

FORBES: Magazine Article

"I'm not complaining and I don't hear anyone else complaining, " manager Joe Girardi said.

WSJ: Pettitte earns win as Yankees beat Blue Jays 9-4

With above-average yields, Mercer had to give Koch some grain, but he's not complaining.

FORBES: Creative destruction 101