1.struggle to 奋力；挣扎

Curiously, the struggle to survive has greatly improved her health.
奇怪的是，她拼命求生的抗争使得她的健康状况大有好转。

It had been an uphill struggle to achieve what she had wanted.
她历尽坎坷才达到目的。

2.account for 解释；说明

Ministers should be called to account for their actions.
部长们应该对他们的行为作出解释。

The social services account for a substantial part of public spending.
社会福利事业占了一大部分的公共支出。

3.tend to 倾向于；趋向

We tend to meet up for lunch once a week.
我们往往每周共进一次午餐。

Older mothers tend to be too idealistic about the pleasures of motherhood.
较年长的母亲往往对身为人母的乐趣过于理想化。

4.need to 需要

Do not wait for good things to happen to you. You need to walk towards happiness.
不要等待好事降临，你要向幸福进发。

You'll need to get on the right side of Carmela.
你得讨卡梅拉的欢心。