我不追随潮流,我创造潮流。
人的生命是有限的,但为人民服务是无限的。
真正的爱国主义不排斥对于其他人的爱国主义的理解。
As in geometry the most natural way of beginning is from a mathematical point, so is the same method in observations and natural history the most genuine, simple, and instructive.