你的大脑比你想象的更强大,关键在于如何激活它。
A mind needs books like a sword needs a whetstone.
地质学研究的真正魅力在于从已知到未知的思维锻炼。
我喜欢把数学看作一种诗歌。
The best books are the ones that children want to read again and again.