No you're... So you're about to go on a date.

那你们两个就去约会吧

耶鲁公开课 - 博弈论课程节选

so it's... pretty near finals. So you can drop any classes you want up until the drop date with like no penalty.

所以……蛮接近期末考试的。所以在退课日之前你可以不受任何处罚退课。

对于返校日 - SpeakingMax英语口语达人

There have also been one hundred-year bonds and there have also been perpetuities that-- in the UK, for example, the British Consoles-- have no expiration date and they have infinite maturity.

还有更长期的一百年债券,还有一种永续年金,比如说英国的大英统一公债,没有过期日,永不到期

耶鲁公开课 - 金融市场课程节选