Liberal democracy may constitute the "end point of mankind's ideological evolution" and the "final form of human government."
爱是唯一在我们分享时会增长的东西。
The true essence of scientific discovery is not in the answers it provides, but in the new questions it raises.
行为主义者放在自己面前的规则或衡量标准总是:我能否用"刺激和反应"来描述我所看到的这一行为?