sign up

动词 sign up:

1. engage by written agreement
   同义词：sign, contract, sign on
2. join a club, an activity, etc. with the intention to join or participate, "Sign up for yoga classes"

1. Many men sign up for the army because they can not get ordinary jobs.
   由于找不到工作，许我男人都报名参了军。
2. The club has signed up a new goalkeeper this season.
   俱乐部这一季节已签约雇用一名新守门员。