be covered with .be covered by 的区别?

来源：学生作业帮编辑：搜狗做题网作业帮分类：英语作业时间：2024/04/30 10:31:15

e covered with一般较具体:
The mountain tops are covered with snow.
白雪覆盖着山顶.
be covered by一般较抽象:
This area has not been covered by the communication net.
这个地区还不在通讯网的覆盖之内.

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