Natural experiments are a powerful tool for understanding causal relationships in the real world.

可持续性不是一种选择，而是我们对后代的责任。

创新不仅仅是技术的问题；它关乎我们如何改变对食品和可持续性的思考方式。

Following your bliss is a recipe for paralysis if you don’t know what you are passionate about. A better motto for most youth is “master something， anything”. Through mastery of one thing， you can drift towards extensions of that mastery that bring you more joy， and eventually discover where your bliss is.

【讲解】：人格高尚的人不可用小事情考验他，却可以委以重任；人格低下的人不可委以重任，却可用小事情考验他。