哦，四月来了，真想回到英格兰。

每一颗播种的种子都是对后代的承诺。

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

The time factor is the most important in trading. Time can turn a small profit into a large one.

一个人的价值应该看他贡献了什么，而不是他能得到什么。