習(xí)慣的強(qiáng)度是其被強(qiáng)化次數(shù)的函數(shù)。
宇宙是一個(gè)相當(dāng)大的地方。如果只有我們，那似乎是對(duì)空間的極大浪費(fèi)。
不要讓那些混蛋把你磨碎。
The great powers are always searching for opportunities to gain power at the expense of their rivals, and they will use force if they believe it will bring them strategic advantage.
Pity, or compassion, is an emotion equally natural to all men.