Chinese is a cool and delicious spring, which makes people sweet and thirst-quenching;

Chinese is fragrant coffee, which makes people warm and romantic;

Chinese is fresh and delicious juice, which nourishes the heart and lungs;

Chinese is fragrant green tea, which is refreshing.

"Mathematics is an infinite maze, which makes people linger."

"History is a vast picture, which makes people think deeply."

Mathematics is a puzzle and interesting.

Mathematics is a treasure buried in the deep mountains, which makes people pursue it diligently.