Such changes are all but invisible over the short time scale of modern observations, and, it is argued, they are usually obscured by innumerable gaps in the imperfect fossil record.

这些变化在现代观测短时间范围内几乎是看不见的，而且，有人认为，这些变化常常被不完善的化石记录中的无数空白所掩盖。

youdao

It is a curious fact that in bad days we can very vividly recall the good time that is now no more; but that in good days we have only a very cold and imperfect memory of the bad.

一个奇怪的事实是，在失意的日子里，我们能够生动地想起不复存在的美好时光；而在得意的时候，对苦难的日子却只留有非常淡漠而残缺的记忆。

youdao

Although imperfect, these central bank actions have been helpful in moderating the severity of economic cycles over time.

尽管这些央行的行为不尽完美，总的来说它们确实有助于缓解经济周期的严重性。

youdao

All right, so last time we started to study imperfect competition.

上一节课,我们开始学习不完全竞争

耶鲁公开课 - 博弈论课程节选

Let me disclaim, too, we're by no means perfect so the Harvard courses APP that a lot of you used on the web to shop for courses, we recently sent out a form to get feedback from everyone because we don't doubt that it was imperfect the first time around, but we're going to iterate and make amends with that.

我不是说，我不是说要完美,你们大部分使用哈佛大学课程APP来在网上选课,我们最近给你们发了一个表单，从你们那里,得到反馈，因为我不怀疑,第一次时它是有瑕疵的,但是我们将反复地道歉。

哈佛公开课 - 计算机科学课程节选

This public humiliation is not the first time that an imperfect messenger has been discredited entirely because of unethical behavior.

FORBES: No Wonder We're Losing Jobs: Science In Our Culture Is Under Assault

But now, the dialogue has changed, and for perhaps the first time this winter, it is possible this imperfect union could end.

WSJ: The Yankees' Next Steps

And yet the relation between economic data - which are often imperfect, and can only represent the state of an economy as it was some time in the past - and the future is tenuous at best.

BBC: A Point of View: And all shall worship money