Papyrography
[医]纸分配层析（法）, 纸分配色谱（法）
🗣️ 情景例句
What's your major?
你主修什么专业？
I asked him if he spoke English.
我问他他是否说英语。
and a period (which is the time it takes a wave crest to travel one wave length).
和周期（浪峰走过一个波长所需的时间）。