这个题目很有意思,记得在美国第一天上课时候,教授给每个学生一张纸,上面有一短
文:
Every morning in Africa, a gazelle wakes up. It knows it must run faster
than the fastest lion or it will be killed.
Every morning in Africa, a lion wakes up. It knows it must outrun the
slowest gazelle or it will starve to death.
It doesn't matter whether you are a lion or a gazelle. When the sun comes up
, you'd better be running!