柠檬问题是指买家无法确定产品质量，因此只愿意支付反映平均质量的价格。

 释义：有才华的人必须要勤于修养，懂得收敛，就好比未经提炼的金玉，虽看起来灰暗无光泽，但日久便会焕发光彩。

If you're horrible to me, I'm going to write a song about it, and it won't be a good one for you.

There’s no such thing as too much butter in a recipe—only too little joy.