首先，必须购买、订购和等待安装新的硬件。

First you must buy, order, and wait to install your new hardware.

youdao

任何希望拥有高于特定排放水平的公司都必须购买许可证。

Any companies wishing to emit above a certain level will need to purchase permits to do so.

youdao

为了确保穿刺了的肚皮保持清洁，她或他必须购买什么用品？

What supplies must he or she purchase, in order to make sure that any pierced belly remains clean?

youdao

While China is going to continue to buy things, it doesn't mean they're going to buy them from us necessarily even though the dollar has gone down a great deal Student: Thank you. This is my last question.

虽然中国还将会继续购买原产品,但那并不意味着他们必须得从我们这买,即使美元已经,大幅度地贬值了,学生：谢谢，这是我最后一个问题。

耶鲁公开课 - 金融市场课程节选