sign-up的中文翻譯是什麼意思

He has posted a sign up that says "No Fishing"

他已經張貼了一張“禁止釣魚”的告示牌。

They manage to sign up all the best performers.

他們設法跟所有最佳演員簽訂合同.

Can I sign up for this course in advance?

我能事先申請上這一課程 嗎 ?

You don't sign up for life, you know.

你用不著參加一輩子的, 你知道罷?

When I'm old enough I'll sign up and go to the front and fight.

我長大了,一定報名入伍,到前線去打仗.