Backknee
[医] 膝反屈
🗣️ 情景例句
Very few people last in this class for the full hour the very first time.
很少人能够第一次撑完一个小时的课。
Great talkers are little doers.
人好说大话，并非实干家。
Oh dear! Where can I go if I want to smoke a cigarette?
天啊！我该到什么地方吸烟呢？