人们对自己的遗传学了解得越多，就越能掌控自己的健康。

The mathematician does not study pure mathematics because it is useful; he studies it because he delights in it and he delights in it because it is beautiful.

决定胜负的不是狗的体型大小，而是狗的战斗意志。

解析：事情做得成功了，就引身退去，这是自然的道理。