我认为最好的写作来自真实的地方，即使它是痛苦的。
"I think the best writing comes from a place of truth, even if it's painful."
"Mathematics is not a spectator sport."
Give the pupils something to do, not something to learn; and the doing is of such a nature as to demand thinking; learning naturally results.
乳制品行业必须适应消费者偏好的变化。
我经常思考劳动和时间。
译文：再好的医生救不了注定要死的人，再凶的人也斗不过老天爷。