古今的变化，不是改变其根本道理，而是改变其方法。
The true cost of food isn't just what you pay at the store—it's what the planet pays over time.
The love for all living creatures is the most noble attribute of man.
Marine ecological balance is more important than short-term economic benefits, we must have long-term vision.
我们教授一门学科不是为了培养关于该学科的小型活图书馆，而是让学生自己学会数学思考。