The Internet has opened up a marketplace where sellers and buyers are virtually ___ (know) to .
问题描述：
The Internet has opened up a marketplace where sellers and buyers are virtually ___ (know) to .
The Internet has opened up a marketplace where sellers and buyers are virtually ___ (know) to each other.
括号中的词变为适当的形式填入空白处,略作说明,顺便翻译一下句子.
答
unknown
are virtually 【known】 to each other."...指网购这个平台买卖双方实际上彼此并不熟悉“