You can take the pillow case off, and please wash it.

你可以把枕套拿下来洗一下。

Then I'm afraid you're precluded from convincing me to take him off this case.

恐怕你也不能说服我不让他负责这个案子。

You can take the pillow case off, and please wash it. You can have different kinds of pillows.

你可以把枕套拿下来洗一下。 你可以有不同种类的枕头。

You then take the pillow cases off just like you take the sheet and other bedding off and you wash it, at least, oh, I don't know, once a year, once a month?

然后你把枕套拿下来，就像你把床单和其他床上用品拿下来洗一样，至少，哦，我不知道，一年一次，一个月一次？