both 表示两者都
如：My parents are both teachers.
all表示三者以上都
如：The students are all very excited.
both和all
作者: admin来源: 网络文章 时间: 2017-01-04
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both 表示两者都
如：My parents are both teachers.
all表示三者以上都
如：The students are all very excited.
