1.drop by 順便拜訪

When men reach the age of 30, their testosterone levels drop by one to two per cent every year.
男子在30歲后，他們睪丸激素水平每年要下降百分之一到百分之二。

This year Britain's nominal GDP-the value of the combined contribution of output and inflation-will actually drop by some 3-4%.
今年英國名義上的國內(nèi)生產(chǎn)總值（指產(chǎn)出和通貨膨脹綜合作用的價值）實(shí)際上將下降3%-4%。

2.take over 接管；接收

He will take over Class 9801 next week.
下星期他將接管 9801 班。

Johnson took over the chairmanship of the committee yesterday.
約翰遜昨天接任委員會主席一職。

3.need to 需要

You need to touch up the poem.
你需要給這首詩潤色一下。

Do we need to discuss this question?
這個問題還用得著討論嗎?

4.pledge to 保證

He would keep his pledge to the utmost of his power.
他將極力信守他的誓言。

In the Second Training we pledge to practice generosity and not support social injustice and oppression.
在第二項(xiàng)訓(xùn)練中，我們保證，實(shí)踐寬宏大量，不支持社會不公正和壓迫。