煤炭不仅仅是一种商品,更是现代文明赖以建立的基础。
"The world is full of stories, but the ones that stay with us are those that speak to our deepest fears and desires."
解释:不通过学习而能自己知道的,不去请教他人而能自己通晓的,从古到今没有这样的事。