Bond order
[化] 键级
🧩 词语组成解析
order
['ɔ:də]
n. 命令;秩序;规则，制度;次序;
vt. 命令;订购;整理;
vi. 下订单;
🗣️ 情景例句
Next weekend ...
下周末……
He alone is poor who does not possess knowledge.
没有知识，才是贫穷。
They are arguing over who should pay the bill.
他们为谁应该付款而争论不休。