乐谱上标有l.h.的部分需要用左手弹奏。

The sections marked ___l.h. in the score should be played with your left hand.

新法案在众议院通过后，将提交参议院审议。

The new bill was approved by the ___L.H. and will be reviewed by the upper house.

轻骑兵部队被派往边境执行巡逻任务。

The ___l.h. troops were sent to patrol the border area.