经济学人下载:民用航空发动机 奋力一战

1.rack up 在比赛中获胜

Adding soy can also help you rack up protein.
增加大豆也能帮助你获得蛋白质。

We use an online bill-paying service, and we buy almost everything by credit card so we can rack up mileage rewards.
我们使用一项网络付账服务，用信用卡买几乎每件东西，因此我们可以累积里程奖励。
2.account for 导致，引起

Computers account for 5% of the country's commercial electricity consumption.
计算机占去该国商业用电的5%。

Now, the gene they discovered today doesn't account for all those cases.
不过，他们现在发现的基因无法解释所有的病例。

3.hope to 希望

Democrats hope to finish the draft in a week.
民主党人士希望在一周内完成该草案。

I really hope to find my prince charming soon.
我真希望能早点找到我的白马王子。

4.seek to 设法；企图

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。