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
Why does it have to be one or the other?
为什么非得有这个就没有那个？
We can't recall how often he's written.
我们记不起来他每隔多久写一封信。
How many would you like to order?
您要订多少？