Psychological understanding comes from seeing mind in action.
Collaboration across borders is key to solving the challenges of global hunger.
The only way to change behavior is through manipulation of reinforcement contingencies.
贫穷不仅仅是缺钱;它是关于拥有的太少以至于你甚至无法做出正确的决定。
都是出卖,卖给中原各国也可以,何必非要卖给越国呢?