Nonrepeatability
不可重复性
🗣️ 情景例句
since this is so easy ....
既然那么简单……
Open your book,please.
请把书打开。
Which may keep company with the vessel for an hour without visible or more than occasional movement of wing.
它们随船飞行一小时也难得见其扇动一下翅膀。