both有形容词，副词，连词词性
both
pron.两者
adj.双方
adv.（与复数名词连用）两个；不仅…而且…；…和…都
例句
This is both a mental exercise and a body relaxing exercise, so hopefully you're ready to drift off at the end of it.
这既是一种脑力活动，同时也是一种身体放松活动，这对于渐渐入睡来说是非常有用的。
"We would like to see both grow significantly over the next three to five years, " she says.
她说：“我们希望看到，两所分校在未来3至5年都能显著成长。”
