染雾either的用法比较灵活，现归纳如下：
1. either用作代词，意为“(两者之中)任一、任何一个”。 
Either (of the books) is popular with the students.
(两本书)随便哪一本都受到同学们的欢迎。(主语)
I have bought two cakes/
either的用法比较灵活，现归纳如下：
1. either用作代词，意为“(两者之中)任一、任何一个”。
Either (of the books) is popular with the students.
(两本书)随便哪一本都受到同学们的欢迎。(主语)
I have bought two cakes/
