机不可失，时不再来。

It was an opportunity not to be missed.

《牛津词典》

我感觉到机不可失，所以径直走到他面前。

I felt now or never and went right up to him.

youdao

机不可失，时不再来。咱们要不要碰碰运气？

It's now or never, shall we chance it?

youdao

机不可失，失不再来，所以一定要把握时机。

Opportunity knocks but once, so we must make the most of it.

youdao

机不可失！我们仍将提供免费的饮料和零食！

Free drink and snacks will still be provided!

youdao

中秋节限时免费，机不可失，让悟空陪你过中秋吧！

Free for Mid-Autumn Festival! Don't lose the chance! Join us, now!

youdao

驶船要乘风，风潮不等人。（机不可失，时不再来。）

Sail while the wind blows; wind and tide wait for no man.

youdao

驶船要乘风，风潮不等人。（机不可失，时不再来。）

Sail while the wind blows; wind and tide wait for no man.

youdao