Quadrivalence
n. 四价\\n[医] 四价
🗣️ 情景例句
And the new drawings for the toy spaceship.
还有玩具太空船的新草图。
His classical music is so quiet. I can't even hear it!
他的古典音乐幽静得听不见。
Sorry! You look the same!
对不起，你们两个看上去一样。