"She was free in her wildness, she was a wanderess, a drop of free water. She belonged to no man and to no city."

因果推断不仅仅是统计显著性；它关乎理解数字背后的机制。

"The gladdest moment in human life, methinks, is a departure into unknown lands."

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。