opportunity knocks

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

机不可失,失不再来, 所以一定要把握时机.

Opportunity knocks but once.

良机难再.

Too often, the opportunity knocks, but by the time you push back the chain, push back the bolt, unhook the two locks and shut off the burglar alarm, it's too late.

机会敲了太多次门，可每到那时，等你把门链解下，把门扒开，打开两把锁，关掉防盗铃之后，一切都太晚了。

A fleeting sensation of domestic happiness passes over me and all my troubles vanish quickly. Opportunity knocks only once, purchase now!

突然一股来自家庭生活的幸福感席遍我的全身，所有的烦恼也都迅速地消失了。

Opportunity knocks at the door only once.

机不可失,时不再来.

Opportunity knocks often -- how are you home?

机遇经常来敲 你家 的门,但是你是否总是在家?

Dad often says that opportunity knocks only once , so one must take it when it comes.

爸爸总说机不可失、时不再来,有了机会一定要把握住.

If opportunity knocks, I will take it.

如果机会来临, 我就会抓住它.