1、take off

(飞机)起飞

We eventually took off at 11 o'clock and arrived in Venice at 1.30.

我们终于在11点起飞，1:30 到达威尼斯。

(产品、活动、事业等)腾飞，突然成功

They need to expand the number of farmers who are involved if the scheme's going to really take off.

这个方案要想真正成功，他们就需要增加参与的农场主的人数。

In 1944, he met Edith Piaf, and his career took off.

1944 年，他结识了伊迪思·比阿夫，从此他的事业开始腾飞。

(突然)离开，走开，走掉

He took off at once and headed back to the motel.

他立刻离开，回到汽车旅馆。

He took himself off to Mexico.

他突然动身去了墨西哥。

把…带走;(尤指强迫某人)使同去

The police stopped her and took her off to a police station.

警察拦住她，把她带到了警察局。

Martinez was taken off to jail.

马丁内斯被抓进了大牢。

2、concern

忧虑;担心

The group has expressed concern about reports of political violence in Africa.

该团体对有关非洲政治暴力的报道表示关切。

The move follows growing public concern over the spread of the disease.

针对公众对该疾病的不断蔓延日益担忧，从而出台了这一举措。

令人担忧的事实(或情况)

His concern was that people would know that he was responsible.

他担心大家会知道是他的责任。

Unemployment was the electorate's main concern.

选民关心的主要是失业问题。

关于;涉及

The bulk of the book concerns Sandy's two middle-aged children.

书中主要描写桑迪的两个已到中年的孩子。

Chapter 2 concerns itself with the methodological difficulties.

第二章讲的是研究方法上的难点。