Change your life today. Don't gamble on the future, act now, without delay.
The structure of DNA was a puzzle that demanded to be solved.
心理学不应关注静态元素,而应关注有机体与环境之间的动态相互作用。
城市是人类最伟大的发明。
事实上,今天的美国女性比历史上任何时候都拥有更多的权力和影响力。