1.need to 需要做

We need to stop trade protectionism.
我们需要制止贸易保护主义。

Three things need to happen.
我们必须做好三件事。

2.easy to 便于

The interface is clean and easy to use.
它的界面很清爽，便于使用。

It is easy to understand mrs obama's frustration.
人们很容易理解奥巴马夫人的恼怒而又不知所措。

3.seek to 设法；企图，试图

Yet some expect him to seek to remove term limits.
可是，部分人士期望他设法废除任期限制。

And they seek to benefit from tiny operational changes.
他们也自生产流程的细微变更中寻求收益。

4.work out 解决；作出

Britain, too, must work out what it wants from the eu.
英国也必须解决一个问题，即本国想从欧盟得到什么。

New cars often suffer quality glitches that auto makers try to work out over time.
新款汽车常常存在质量上的毛病，需要生产商花时间来解决。