Polyazin
[医] 多氮化合物
🗣️ 情景例句
but he has to work today,
但他今天工作忙，
Though the fox run, the chicken hath wings.
狐狸虽会跑，小鸡有翅膀。
Many of the stars cannot be seen because they are too far away.
许多星星我们之所以看不见，是因为它们离我们太远。