intent on 专心于；决心，坚决

He's intent on getting promotion, and no one's going to stop him!

他一心一意想得到晋升，谁也劝阻不了他！

I was so intent on my work that I didn't notice the time.

我专心工作，没有留意时间。

She is intent on getting the job done quickly.

她决心尽快把这件事情做好。

judging by/from 根据……作出判断

Judging from previous experience, he will be late.

根据以往的经验来看，他得迟到。

The performance was good, when judged by their usual standards.

按他们平时的水平衡量，这次演出不错。

You shouldn't judge by appearances alone.

你不应该单凭外貌去判断。

jump off 跳下来；开始

Don't jump off a train when it's on the move.

火车没有停稳时不要跳下来。

The bus stopped and he jumped off.

公共汽车停下来，他跳下了车。

The project jumped off to a good start.

工程很顺利地开始了。

jump the gun 赛跑鸣枪前抢先跑出；性急地讲话或动作，过早行动

They jumped the gun by building the garage before permission had been given.

他们未得许可就抢先盖了车库。

Don't jump the gun.We need a further discussion.

不要草率行事，我们还需要作进一步讨论。

He dosen't want to jump the gun.

他不想操之过急。