Klein's muscle
[医] 克莱因氏肌, 吮肌(唇的压肌)
🧩 词语组成解析
🗣️ 情景例句
It's not difficult.
这不难。
I worked as an intern in that firm last summer.
去年夏天我在那家商行实习。
They are walking over the bridge.
他们正在过桥。