人们必须承认不可避免的历史进程。

One has to accept the inevitable course of history.

youdao

人们必须承认，志愿者生活是辛苦的。

People have to admit voluntary life is hard.

youdao

为了充分挖掘拍卖的潜力，人们必须承认存在一系列此类模式假定的交易模式-尤其是网络上。

To appreciate the full potential of the auction, one must recognize the many possible permutations this model can assume -- especially on the web.

youdao

He wasn't that widely read, I must admit, but it shows us how far pro-slavery could ultimately go.

我必须承认,他的作品流传不广,但他向人们展示了亲奴主义者可以走多远

耶鲁公开课 - 美国内战与重建课程节选