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

When an opportunity is neglected, it never comes back to you.

机不可失,时不再来,机会一过, 永不再来.

A mill cannot grind with the water that is past.

机不可失,失不再来.

It was as if she were looking into immeasurable space.

她似乎看到的只是深不可测的空虚.

His constant and deep grief fills me with sympathy and compassion.

他终日陷在深不可测的悲哀之中,使我对他不胜同情和怜悯.

The river is unfathomably deep.

河水深不可测.

She felt it incumbent upon her to answer the letter at once.

她感到立即回信是她义不容辞的责任.

The duty of the pollution-control for the laboratory chemists was also emphasized.

强调“谁污染,谁治理”是化学工作者义不容辞的职责.

It's incumbent on us to give them whatever help we can.

竭尽全力帮助他们是我们义不容辞的责任.

During this process, National High-tech Zone should a role of spearhead.

高新区在此过程中应义不容辞地担当起排头兵的作用.

The nurse assumes responsibility and accountability for individual nursing judgements and actions.

护士对个人的护理判断和护理行动有义不容辞的责任.

I feel bound to maintain the honour of that uniform.

我觉得维持这种制服的荣誉是义不容辞的.

Therefore, developing financial derivative deal and expanding financial derivative market are urgent.

因此, 开展金融衍生产品交易,发展我国金融衍生产品市场已经时不我待.

He has to associate with tough criminals.

他与那些死不悔改的囚犯打交道.

All are brave when the enemy flies . 293. Misfortunes never come alone.

敌人逃窜时,人人都成了勇士. 祸不单行.

One misfortune follows another.

一件件不幸的事接踵而来;祸不单行.

Misfortunes never come singly, the two will fuse Bishangjuelu Han Army.

祸不单行, 两条导火索将汉军逼上绝路.

To add to their unemployment woes, Fu accidentally fell pregnant.

真是祸不单行,他们不幸失业, 付姓女子又意外怀孕.

Blessings never come in pairs ; misfortunes never come singly.

福无双至,祸不单行.

This , coupled with brisk action drama, and large movements of the head of a well-deserved reputation.

爽快的动作再配合剧情, 动作大片的名头名不虚传.

He does plum-blossom-stake exercises gracefully and proficiently, and is true to his name.

他打这套梅花拳时套数熟练,动作优美, 果然名不虚传呀.