As ever more Americans live alone, unconditional affection is in demand.

随着美国独居人数的增多，这种无条件的爱更是广受欢迎。

This guy is in demand right now!

这个人现在很抢手！

The product, the iDope, is in demand.

该产品 iDope 很受欢迎。

Kareem says, " Our product is in demand." If something is " in demand, " it is desired.

Kareem 说，“我们的产品很受欢迎。”如果某样东西“很受欢迎”，它就是人们想要的。

You might read in the newspaper that housing is " in demand."

您可能会在报纸上读到住房“供不应求” 。

Our product is in demand and we need to meet that demand with a larger production run.

我们的产品很受欢迎，我们需要通过更大规模的生产来满足这种需求。

Medical oxygen is in demand in Indian hospitals as they battle with a spike in COVID-19 cases, with more than 392,000 new cases recorded on Sunday.

因要对抗新冠病例的激增，印度急需医用氧气，该国周日记录的新增病例超过39.2万例。

Something that is " in demand" (demand) is something that people want – in this case, something people are willing to pay for.

“供不应求” （demand）的东西是人们想要的东西——在这种情况下， 是人们愿意为之买单的东西。

Those materials are a part of the surplus produce of those countries, which, unless it was annually exchanged for something which is in demand here, would be of no value, and would soon cease to be produced.

这些材料是这些国家剩余产品的一部分，除非每年将其换成这里需要的东西，否则它们将毫无价值，并且很快就会停止生产。