买水管、延长线或梯子时,买比你认为需要的长得多的。才会是正确的尺寸。
The challenge in learning is not just to memorize, but to generalize from specific examples to broader concepts.
理智是不朽的,其他一切都是有限的。
The goal of education is not to increase the amount of knowledge but to create the possibilities for a child to invent and discover, to create men who are capable of doing new things.