学习数学的唯一方法就是做数学。
The real hero is the one who fights even though he is terrified.
可持续性是现代农业的基石。没有它,我们可能会失去我们所建立的一切。
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。
My favorite things in life don’t cost any money.It’s really clear that the most precious resource we all have is time.
"The past is not dead; it is not even past."