Ignoring isn’t the same as ignorance, you have to work at it.
广义相对论可能是所有现有物理理论中最美的。
孩子从你的行为中学到的比从你的教导中学到的更多。
Drawing for children is about capturing the essence, not the detail.
To lose one parent may be regarded as a misfortune; to lose both looks like carelessness.