And I had the good fortune to secure myself immunity in exchange for my cooperation.而我運氣好到可以用合作來換取我的豁免權

in exchange for交換； 調換

Please let me have a marketable lot in exchange for them.

請允許我們收到能出售的貨物并將原貨寄回。

I gave Mary an apple in exchange for my favorite banana.

我送給瑪麗一個蘋果換我最喜歡吃的香蕉。

and I passed it off on him.然后再冒充真品賣給他

pass on傳遞；傳授

Seek him out and pass on the news.

把他找出來并且把消息傳達給他。

Let's pass on to the next item on the agenda.

咱們進行議事日程的下一個項目吧。

Why would Conrad hold on to somethingthat he knows has little value whatsoever?康拉德怎么會抓住一件無論怎么看都毫無價值的東西不放呢

hold on 抓住；繼續；堅持；忍受

He held on to the rock to stop himself slipping.

他緊緊抓住巖石以免自己往下滑。

These nuts and bolts hold the wheels on.

這些螺帽和螺栓把輪子固定住了。