we do not know when man first began to use salt,but we do know that it has been used throughout his这是什么意思!
问题描述：
we do not know when man first began to use salt,but we do know that it has been used throughout his
这是什么意思!
答
虽然我们并不知道人类最早何时开始使用盐，但我们确切知道在整个人类历史过程中，盐一直为人们所用。
答
我们不知道什么时候开始使用盐，但是我们知道因为第一个人我们学会了使用盐。
答
We do not know when man first began to use salt,but we do know that it has been used throughout his history.
谁都不知道,人类是什么时候开始食盐的.但我们的确知道,食盐已经贯穿于整个人类历史.