Corrugations
n. 起皺；皺狀；灌水溝；波紋成形
??? 情景例句
In about half an hour. Why?
大約半個小時。為什么問這個？
I suppose Randy will return tomorrow for her hat.
我想蘭蒂明天會自己回來拿她的帽子。
They talked and laughed happily. Then they saw some banana trees.
他們說說笑笑，很開心。后來他們看見一些香蕉樹。