他立刻就抓住帮老板去干洗店取衣服这个机会，因为他认为这样或许会帮助他获得他一直想要的升迁（机会）。

He jumped at the chance to pick up his boss laundry because he felt it would help him get the promotion he d been wanting.

youdao

然后他就踮着脚尖，非常谨慎地从树林中溜出去，直到后来他认为别人已经听不见他的脚步，就立刻飞脚向沙滩那边直跑过去。

Then he tiptoed his way cautiously among the trees till he felt that he was out of hearing, and straightway broke into a keen run in the direction of the sandbar.

youdao