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.
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.