he signed up
他报名参加了
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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。
《柯林斯英汉双解大词典》
When he signed up for it he didn’t know what he was getting into.
当他报名时并不知道他面对的将是什么。
youdao
When he signed up for it he didn't know what he was getting into.
Then Duffy heard a radio commercial about CBT while driving, and he signed up in 2000.
FORBES: Patient Fix Thyself
He signed up to the fiscal pact, disavowing an electoral pledge to change it.
WSJ: France, Germany Face Relationship Test
When he signed up in 2005, SiriusXM had approximately 600k subscribers, while XM had over 4 million.
FORBES: Report: For Sirius XM, It Won't Matter Whether Howard Stern Stays Or Goes
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