concern v. ( 因為有興趣的有重要性而 ) 關心；使擔憂
【例】I am concerned about mother's health. 我擔心母親的健康。
【類】arrhythmic:regularity＝apathetic:concern
無節奏的不規則＝冷漠的不關心
baleful:menace＝solicitous:concern 有害的東西危害＝關切的人關心
flip:respect＝nonchalant:concern 不敬的不尊敬＝冷淡的不

Should you have any questions or concerns.
萬一您有任何問題或疑慮

1、使擔憂；使掛念；使焦慮 v.
The state of my father's health concerns us greatly.
我父親的健康狀況讓我們非常擔心。
[ + that ] It concerns me that he hasn't been in contact.
還沒有聯絡到他，我很擔心。

2、對…很重要；與…相關；涉及到…，關係到…
Matters of pollution and the environment concern us all.
污染和環境的問題與我們所有人都息息相關。
What I have to say to Amy doesn't concern you.
我要跟埃米說的事與你無關。

（故事、電影或文章）涉及，是關於…的
The documentary concerns a woman who goes to China as a missionary.
電影講述的是一位去中國傳教的女子的故事。

★concern yourself 關心;關注;擔心
There's no need for you to concern yourself with what happened.
你不用操心發生了甚麼事情。
Don't concern yourself. She'll be home soon.
別擔心，她很快就會回家的。

★to whom it may concern （用於正式信函開頭處）敬啟者

3、擔心；憂慮；掛念；憂慮的事情 n.
Concern for the safety of the two missing teenagers is growing.
兩名失蹤少年的安危越來越令人擔憂。
There's a lot of public concern about/over dangerous toxins recently found in food.
公眾對近來在食物中發現危險毒素一事非常不安。
[ + that ] My concern is that you're not getting enough work done.
我擔心的是你你工作的完成量不夠。

4、公司，企業
a family concern
家族企業
It started slowly, but the company is now a going concern (= doing business effectively).
公司起步很慢，但現在生意做得很好。

5、重要的事；關心的事，關切的事；關心，關切
[ + to infinitive ] His concern to appear sophisticated amused everyone.
他一心要顯得老練，讓大家覺得很好笑。
The company's sole concern is to ensure the safety of its employees.
公司唯一關注的是要確保其員工的安全。
There's a matter of some concern that I have to discuss with you.
我有件重要的事要跟你商量。

6、關切的事；關心的事；有利害關係的事
What were the major concerns of the writers from this period?
這個時期的作家主要關注的是甚麼？
I don't want to hear about it - it's no concern of mine!
我不想聽那件事——完全與我無關！
"What's happening?" "That's none of/not any of your concern."
「發生甚麽事了？」「不關你的事。」

★be of concern 很重要；有重大影響
The results of the election are of concern to us all.
選舉的結果對我們所有人都有重大影響。