never

Even after failing twice, she kept trying—never say die!

即使失败了两次，她仍在努力——永不言弃！

I forgot to bring your book. — Never mind, I'll borrow it tomorrow.

我忘记带你的书了。——没关系，我明天再借。

He gave me his old computer for free. I won't complain about its speed; never look a gift horse in the mouth.

他免费把他的旧电脑给了我。我不会抱怨它的速度；不要对礼物挑剔。

I will never give up on my dreams.

我永远不会放弃我的梦想。

He said he would never learn to swim, but never say never.

他说他永远学不会游泳，但永远别说决不。