Enlistment is the act of joining the army, navy, marines, or air force.
例句
Canadians seek enlistment in the US Marines because they don't see as much opportunity in the Canadian armed forces.加拿大人寻求加入美国海军陆战队，因为他们认为在加拿大军队里机会没那么多。
N-VAR
服兵役年限;服役期
Enlistment is the period of time for which someone is a member of one of the armed forces.
例句
At the end of my term of enlistment I decided to return to civilian life.在我退役的时候，我决定复员过平民生活。