opportune
adjective /ˈɒpətjuːn/
  /ˌɑːpərˈtuːn/
 (formal)- (of a time时间 恰好的;适当的;恰当的 - The offer could not have come at a more opportune moment.那个建议提得正是时候。 
- Chapman decided the time was opportune for talking business.查普曼认为这是谈生意的好时机。 
- It was an opportune time to look at the offer in more detail.这是一个更详细地审视报价的好时机。 
 
- The offer could not have come at a more opportune moment.
- (of an action or event行动或事情 及时的;适时的 - an opportune remark适时的言辞 
- The publication of the book now is quite opportune.这本书现在出版非常及时。 
 opposite inopportune
- an opportune remark
词源late Middle English: from Old French opportun(e), from Latin opportunus, from ob- ‘in the direction of’ + portus ‘harbour’, originally describing the wind driving towards the harbour, hence ‘seasonable’.