eg:Twenty percent of country is covered by islands 1 The mountain peaks was covered with snow.2

eg:Twenty percent of country is covered by islands 1 The mountain peaks was covered with snow.2

题目
eg:Twenty percent of country is covered by islands 1 The mountain peaks was covered with snow.2
为什么两个句子一个with一个by?
答案
be covered with 表示完全覆盖,盖满了
be coverde by 表示覆盖,部分覆盖
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