I don't sing because I'm happy; I'm happy because I sing.
我们必须倾听科学,并让它指导我们在水产养殖中的决策。
The most important property of a program is whether it accomplishes the intention of its user.
故事是作者写给自己的信,用来告诉自己那些无法以其他方式发现的事情。