Backward curvature
[医] [脊柱]后弯, 脊柱前凸
🧩 词语组成解析
n. 弯曲, 曲率\\n[医] 弯, 曲
🗣️ 情景例句
OK, OK- just try to calm down, sir.
好，好，请冷静下来，先生。
Education begins a gentleman, conversation completes him.
人的教养始于教育，成于社交。
Hello, everyone!
大家好！