一个句中两个that在一起的分别定义

That that is is ;that that is not is not;that that is is not that that is not; that that is not is not that that is .

*两个that放在一起，实际上第一个that等于the thing，第二个that引导出一个定语从句，修饰the thing 。

*文句中出现的is 有两种情况，一是系动词，表示“是”或“不是”；二是实意动词，表示“存在”的意思，相当于exist。

我们不访据此改写这句话：

The thing that exists exists; the thing that does not exist does not exist; the thing that exists is not the thing that does not exist; the thing that does not exist is not the thing that exists.

翻译成中文可以为“实是实，虚是虚，实非虚，虚非实。”