The system is unable to log you on.

　　這個系統無法讓你登錄。

　　She had shown herself unable to deal with money.

　　她所做的事已表明她不善理財。

　　The company was unable to match his current salary.

　　當時公司付不起和他現在相同的工資。

　　The police were unable to gain entrance to the house.

　　警方怎么也進不去這棟房子。

　　The company has been unable to fill the post.

　　公司的這個空缺還未能填補。