In no way can sport be considered a luxury object.
Don't be afraid of challenges, because they make you grow.
我们想要的未来必须被发明出来,否则我们将得到一个我们不想要的未来。
The best time to plant a tree was 20 years ago; the second-best time is now.
数学家最好的工作往往来自于在别人看不到联系的地方发现联系。