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
A large number of American radio stations operate in the red.
许多美国电台亏损经营。
We don't go dancing very often.
我们不经常跳舞。
What's the time?
几点了？