Be realistic, demand the impossible!
The key to credible causal inference is not just the method, but how well the method fits the question at hand.
真实生活就通常就是我们无法掌控的生活。
粮食安全是国家安全的基石,我们必须牢牢把握在自己手中。
重要的不是金钱,而是你拥有的人才、领导方式以及你的理解程度。
Science is the knowledge of consequences, and dependence of one fact upon another.