Sigmoidal
反曲
🗣️ 情景例句
How much notice of cancellation is necessary to get my deposit back?
想把定金拿回来，要提前多长时间通知你才行？
I'm free tomorrow.
我明天有空。
The student did in an archway nearby where he could watch and hear everything that went on.
那个学生躲在附近一拱形的门廊里，在那儿可以看见、听到现场发生的一切。