Bivacancy
(在原子外壳中的)双空位
🗣️ 情景例句
Susan and Harry have a sitter for Michelle in the city,
Susan和Harry在城里给Michelle找到一位临时保姆，
Pitchers have ears.
隔墙有耳。
Hi, Li Lei! How are you?
嗨，李垒！你好吗？