Corrugations
n. 起皱；皱状；灌水沟；波纹成形
🗣️ 情景例句
I have to cram all night for tomorrow's exams.
为了明天的考试，我得熬夜临阵磨枪。
Well, the worst of the winter should be over.
不过，冬天最糟糕的一段日子总该过去了。
Are there any flowers in the picture?
画里面有花吗？