Bivacancy
(在原子外壳中的)双空位
🗣️ 情景例句
In Thailand we greet strangers as long lost friends.
在泰国我们跟陌生人像失去联络好久的老朋友一样打招呼。
Pigs may fly,but they are very unlikely birds.
猪儿纵会飞，终究不是鸟。
But for the English examination, I would have gone to the concert last Sunday.
上个星期天，要不是有英语考试， 我就去听音乐会了。