Klein bottle
[数] 克莱因瓶
🧩 词语组成解析
n. 克莱因（男子名）
🗣️ 情景例句
Oh, thank you! Thank you!
哦， 谢谢， 谢谢 。
Just to be on the safe side.
为安全起见。
Anyone who has played even in a school football match knows this.
即使是仅仅参加过学校足球赛的人也有种体会。