sign-up
柯林斯词典
1. PHRASAL VERB If you sign up for an organization or if an organization signs you up, you sign a contract officially agreeing to do a job or course of study. 和…签约; 报名参加 (课程)
He signed up as a flight attendant with Korean Air. 他与大韩航空公司签了约,当机乘员。
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