1.subject to 使服从，使遭受

Already americans are subject to de-facto capital controls.
如今美国已经受到变相的资本控制。

The advance estimate is subject to two revisions in coming months.
这个预先估计在未来的几个月中需要受到两次修订。

2.curious to 好奇的

Makes me curious to see you in this neighborhood.
在这一带见到你，我感到很好奇。

I'm curious to hear more about your experience.
我很想多了解关于你自身的体验历程。

3.add to 增加， 加强

What provisions would you add to this one?
你会为再添加什么乐观信条吗？

Mr obama offers only to add to its complexity.
奥巴马的提议却只会增加它的复杂性。

4.able to 能；会

He was even able to build his own home.
他现在甚至能建一所自己的房子。

How fortunate that he had been able to love!
能爱别人是多么幸运的一件事！