形容词是：incredible

adj. 不能相信的，难以置信的；极好的，极大的

They become incredibly selfish , unfeeling , and expert manipulators .

他们变得极为自私、无情和会操纵别人。

That is what rafa nadal is doing incredibly well .

纳达尔在那方面做的难以置信地优秀。

Once you 've shown the other person that you need them , then you 've made yourself incredibly vulnerable .

一旦你向另一个人表示，你需要他们，就会使自己变得极为脆弱。