concern [kənˈsɜ:rn]
CET6/CET4/IELTS/TOEFL
难点：一词多义/商务英语
v. 担忧；担心

What concerns me is your attitude towards our relation. 让我担心的是你对我们之间关系的态度。
It concerns me that my brother stays at home alone. 我弟弟一个人在家，这让我担忧。
v. 与... 有关；涉及；牵涉；影响
be concerned with sth. 与某事/某物有关
to whom it may concern 敬相关人士
Don't take part in what doesn't concern you. 不要多管闲事。
The book concerns Peter’s effort to save his children. 这本书讲的是彼得奋力营救他的孩子的故事。
Where our healthy is concerned, no compromise is acceptable.
在事关我们健康的问题上，那是毫无妥协余地的。
v. 感兴趣
concern oneself with/about sth. 对...感兴趣
She didn't concern herself with the results. 她对结果不感兴趣。
n. 担忧；忧虑
a matter of concern to 一件让人担忧的事
concern about/for/over sth./sb. 对某人/某事/某物的担心；忧虑
There is growing concern about global warming. 人们对全球变暖的忧虑日益加重。
The report expressed concern over children's weight. 报告表达了对儿童体重的忧虑。
n. 关爱；关心

parents' concern for their children 父母对子女的关爱
n. 重要的事情
What are your main concerns as a minister? 作为一名部长，你主要关注的是哪些问题？
The government‘s primary concern is safety. 政府首要关注的是安全问题。
n. 负责的事；有权知道的事
This matter is our concern. 这件事由我们负责。
What I am doing is none of your concern. 我在干什么没有必要告诉你。