我们必须这样做。

We must do it.

youdao

我们能够做出这些改变---我们必须这样做！

We can make these changes---and we must.

youdao

你是对的。我们必须这样做。虽然开发新产品风险大成本高。

You're right. We must do so, although developing new products is risky and costly.

youdao

Now, in that Northern society and here we're using labels pretty loosely, but so be it the northern states; and well I'll leave the outline up for the moment. No I won't.

现在,在北方社会,现在我们标记做得很散,但必须这样,北方的州,我呆会会给你们一个大纲,但不是现在

耶鲁公开课 - 美国内战与重建课程节选