Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information upon it.

Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information upon it.

知识有两种。我们自己知道一个主题，或者我们知道在哪里可以找到关于它的信息。

-- Samuel Johnson 塞缪尔·约翰逊