opportunity knocks but once

网络释义

1.	机不可失，时不再来求日常... ... It's very thoughtful of you. 你想得真周到。 Opportunity knocks but once. 机不可失，时不再来。 I agree. 我同意。 ... zhidao.baidu.com
2.	良机难再痛失良机用英语怎么说... ... Opportunity knocks but once. 良机难再。 Don't let the good chance slip. 良机勿失。 ... www.1stenglish.com

释义:

机不可失，时不再来,良机难再

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