both接复数名词of可以省略，一个两句的复数名词是什么啊？都是形容词吧？

both的用法：

与复数名词复数连用，表示两个，两个都。e.g. Both boys have been ill.both…and…不仅…而且…；…和…都。 e.g. Both his mother and his father will be there.

参考资料：牛津高阶第七版