1.deal with 应付；对待

He also has some unfamiliar problems to deal with.
但他还有一些不熟悉的问题需要处理。

Deal with a boss who bullies.
对付以强欺弱的老板。

2.keep up 持续不变；保持；保养

Many japanese strive to keep up egalitarian appearances.
很多日本人努力保持平等待人的形象。

Magritte could not keep up this phlegmatic act, however.
话虽如此，但他似乎无法这种保持冷静的行为。

3.link to 与…连接， 联系

Why not express those thoughts coherently and all together on a blog or facebook or google plus post, and link to that from twitter?
为什么不一口气在博客或者Facebook或者Google Plus的帖子里阐明自己的观点，再在Twitter上发布相关链接呢？

I have to say that I am really enjoying my direct link to the cloud, which was inserted in the soft tissue behind my eye last winter.
我得说，我相当享受与云端的直接链接，去年冬天，它们植入了我双眼下面的软组织中。

4.fail to 未能

Things change and when you fail to grasp that truth you suffer.
世事变迁，而且你也未能领会承受折磨的真相。

Those who view liquidation of past excesses as the solution fail to understand the risks.
那些认为清除过去的金融过度现象就能解决问题的人，未能理解风险所在。