对认知的研究需要经验方法和理论方法的结合。
If you're not improving, you're falling behind—especially in an industry as dynamic as animal husbandry.
专制制度就像地狱一样,并不容易战胜,但我们可以安慰的是:斗争越艰巨,胜利将越光荣。
The best way to overcome fear is to face it.