these修饰可数名词复数。

修饰不可数名词的一般有this, that, little, a little, a bit of, much, a great deal of等； 有些修饰语既可修饰可数名词也可修饰不可数名词，如all, some, enough, a lot of, lots of, plenty of等。

相关介绍

These problems are all in your mind, you know.

你知道，这些问题都只是你的凭空想象而已。

These statistics are important from an ecological point of view.

就生态学而言，这些统计数字很重要。

We sell a lot of these to people like yourself.

我们把许多这种东西卖给您这样的人。