be covered是什么意思
be covered
be covered with
英语be covered with
digits covered是什么意思
is covered是什么意思
covered in mud是什么意思
be covered in 和be covered with 有什么区别?
be covered with 与be covered by的区别是什么?
be covered with和be covered by有什么区别?
be covered with .be covered by 的区别?
be covered with 和be covered by 可否通用?