正误辨析

摘要

1.两千年前,地球上只有2亿5千万人。误:Two thousands years ago,there wereonly 250 millions people on the earth. 正:Two thousand years ago,there wereonly 250 million people on the earth. 析:表示一个确切的数量时,我们在hundred、thousand、million、billion的后面不可加复数词尾-s,