机不可失，时不再来。

It was an opportunity not to be missed.

《牛津词典》

但是灵感在召唤你，机不可失时不再来。

But inspiration beckons you, and there are possibilities out there that may never come again.

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

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