乘机的英文：
seize the opportunity

参考例句：

Many landlords, rich peasants and riff-raff have seized the opportunity to sneak into our Party.
这即是有许多地主分子、富农分子和流氓分子乘机混进了我们的党。

We should seize the opportunity to counterattack.
现在，我们应乘机反攻。

He snatched a kiss when no-one was looking
无人注意时他乘机吻了一下。

What is the check-in time for the flight?
什么时候办理这次航班的乘机手续?

He takes advantage of her ignorance and simplicity; it isn't cricket.
他乘机利用她的无知和单纯，这种做法是不公平的。

A band of suitors is destroying his property as they woo( attract or court) his wife Penelope.
一群追求者们在向他的妻子珀涅罗珀求爱，乘机来侵占他的财产。

seize是什么意思：
v. 抓住；把握（时机，机会等）；扣押，没收；夺取；控制；逮捕

seize the time ";"seize the day, seize the hour
只争朝夕

The engine has seized up and stopped.
机器卡住不动了。

To enchant or seize with rapture.
使着迷使陷入狂喜，销魂的境地

They will seize, they will slay me.
他们会把我抓走，他们会杀死我的。

The policeman seized the thief.
警察捉住了那个小偷。

opportunity是什么意思：
n. 机会，良机

He eagerly embraced the opportunity.
他迫不及待地利用了这个机会。

This opportunity is too good to waste.
这个机遇千载难逢，绝不能错过。

Health Opportunity for People Everywhere
各地人民均可享受的保健机会

If the opportunity for an interview with a paper arises.
如果有报纸采访的机会

Such an opportunity of exhibiting was delightful to her.
这种出风头的机会她是求之不得的。