今天种下的每一棵树都是留给明天的遗产。
在数学中,提出问题的艺术必须比解决问题更有价值。
There are some things so serious you have to laugh at them.
我们不仅要造车,还要造好车,造让中国人骄傲的车。
"The best children's books are the ones that don't talk down to children."