柠檬问题发生的原因是卖家比买家更了解产品，从而导致市场失灵。

Because we are food for worms, lads. Because, believe it or not, each and every one of us in this room...is one day going to stop breathing, turn cold and die.

解释：大多数花类药材都有升散的作用，而旋覆花却有降气的作用，说明药材特性的多样性。

I hope to inspire others to pursue their passions and dreams.