对...有用

be of advantage to to be sure of to be scared of not to be thought of be of some help to sb. be tied to the chariot of be left to the tender mercy of sequence of trains to be humped be out of all relation to per cent of absentees to total staff in service to-be be of help to be of assistance to sb be sick to death of... motion to quash service of summons be subject to fits of passion amount of silkworm to be raised cleaning of surfaces to be welded drawing of position to be detected location of the machine to be installed volume of unit to be evacuated be of some help to sb