让我这个经历过九年制义务教育的大学生来告诉你答案吧!
【含义】
1.be concern about: 英[bi kənˈsɜːn əˈbaʊt] 美[bi kənˈsɜːrn əˈbaʊt]
关心;
2.care for: 英[keə(r) fɔː(r)] 美[ker fɔːr]
v. 照顾; 关心; 喜欢;
【用法】没有什么大的区别，就是care for还有喜欢的意思。
1.be concern about:被关注。Why don't we try to be concern about our parents from now on rather then take care when they pass away?
我们为什么不尽力从现在就开始关心他们而不是到他们去世以后再去做这些？
So it is vitally important to the design of ventilation systems. The designer of the electrical structure must be concern about that, if wind road is smooth and reduce the resistance of the local structure of generator and improve heat dissipation.
因此，通风系统流场的设计显得至关重要，风路是否顺畅，能否降低发电机各个局部结构的阻力并提高散热效果，是电机结构设计者必须关心的问题。
2.care for:关心，照顾；喜欢。
His natural mother was unable to care for him so he was raised by an aunt.
他的生母不能照顾他，所以他是姑姑抚养大的。
I had a strong desire to help and care for people
我非常渴望能够帮助和照顾他人。
be I concern about.
被我关注.
care for 关心,照顾；喜欢
I don't care for that colour.
我不喜欢那种颜色.
I believe you must care for his educations.
我相信你肯定关心他的教育吧.