beconcernedwith和about的区别

　　例句：

　　The soldiers concerned were unarmed at the time.

　　有关士兵当时未携带武器。

　　He knew her weak spot where Steve was concerned.

　　他了解她在与史蒂夫有关事情方面的`缺点。

　　He didn't seem in the least concerned for her safety.

　　对她的安全他似乎一点都不担心。