Articulatio plana
[医]平面关节：滑膜关节的一型，此种关节的两个相对面是扁平或微凹的，在韧带控制的狭窄限度内，仅可做任何方向的简单滑动
🧩 词语组成解析
[医] 关节
[医]〔单planum〕平面
🗣️ 情景例句
I was very sad indeed to hear about it.
听了这件事，我的确非常难过。
When did you arrive?
你什么时候到达?
He is now satisfied merely to try to stand up, but as soon as he does so a porpoise knocks him flat.
此时的海龟，只要能站起来就满足了，但它刚站起来，就被一只海豚击倒。