我们开采的每一吨煤炭都必须以最小的环境影响创造最大的价值。
"The essence of mathematics is not to make simple things complicated, but to make complicated things simple."
作家的职责是讲述真相,即使它令人不适。
I don't know why people hire architects and then tell them what to do.
Teachers are the most important role models in schools, the most instructive examples, and the most vivid examples for students.