about
单词辨析：
普通用词，常用于不及物动词之后。
They sat there and talked about what had happened in the past.
她们坐在那里，谈论着过去发生的事情。
There is nothing to complain about.
没有什么可抱怨的。
多用于正式文体，含有“涉及”的意思。
The chairman's report is concerning the education of children.
主席的报告是关于儿童教育。
A law concerning food contamination must be made.
必须制定一项关于食品污染的法律。
尤用于信函或演说中。
Regarding your recent enquiry, I have enclosed a copy of our user guide.
关于您最近的咨询，我随信附上一份我们的用户指南。
I'll make no comments regarding this question.
对于这一问题我不作评论。
与 concerning 基本同义，常可换用。
I have nothing to say respecting/concerning the matter.
关于这件事，我无话可说。
Respecting/concerning the fact that the accused was a minor, the charges were dropped.
鉴于被告是未成年人，起诉被撤销。
多用于非正式场合，常见于美国英语。也用作 around about。
She has around ten million US dollars in the bank.
她在银行里存有大约一千万美元。
Janet left here around seven o'clock.
珍妮特大约7点钟离开这里的。
表示实际数量可多可少或数值、尺寸等可大可小，也作 round about。
They left the museum at about 10 o'clock.
他们10点左右离开了博物馆。
He lives about 5 miles away.
他住的地方离这里5英里左右。
多用于书面语，强调接近精确数值、数量、时间等，误差较小。
The plane will be taking off in approximately ten minutes.
飞机大约10分钟后起飞。
He owes me approximately 400 US dollars.
他欠我大约400美元。
指按粗略估计，不强调十分接近精确数值。
There were roughly 300 people there.
那里大约有300人。
The Antarctica is a continent centred roughly on the South Pole.
南极洲是一片大致以南极为中心的大陆。
相关例句：
Rachel was going to do something about Jacob
蕾切尔将对雅各布有所行动。
They told me about isolation and public apathy.
他们向我谈到了孤立无助和公众的冷漠。
There's lots of money about these days for schemes like this.
近来这类计划资金充足。
They often saw me out and about.
他们经常看见我四处奔波。
I'll have a think about that
我会考虑考虑的。
Everyone was running about.
大家都在跑来跑去。