Terra fullonica
[医] 磁土, 漂白土
🧩 词语组成解析
[医] 土, 土地
🗣️ 情景例句
How did you do that?
你怎么做到的呢？
He is playing on the merry-go-round in the park.
他正在公园里骑旋木马。
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）。