最好的数学是简单的,但又不至于过于简单。
The role of the artist is to question, to challenge, and to reflect the complexities of our world.
我们不能忽视煤炭的经济作用,但也不能忽视其环境影响。
取得成功的秘诀就是开始行动。
The piano is like an old friend to me.