Valvula
n. 瓣, 瓣膜\\n[医] 瓣, 瓣膜
🗣️ 情景例句
Robbie, you're something!
Robbie，你真是有骨气！
Fall sick and you will see who is your friend and who is not.
困难见友情。
gravity is the force that drives them in a continual attempt to restore the ocean surface to a flat plain.
地球引力是持续不断企图使海面复原为平面的力量。