Bivalency
二价
✅ 同义词
🗣️ 情景例句
Would you happen to have a room for two availbale
你们可有一个双人房间
Men know where they were born, not where they shall die.
人能知其生于何地，不能知其死于何方。
unless the parents themselves have been unsatisfactory,
除非父母自身不能令人满意，