参军

Five months have elapsed since he joined the army.

"自从他参军,经五个月了。"

He wished to join the army,but was rejected as medically unfit.

他想要参军,但因体检不合格而未被批准。

"According to the law, a young man should enlist when he is 18."

根据法律规定青年人年满八岁必须参军。

He was scarcely sixteen when he joined the army.

他参军时刚刚六岁。