Contractual usage
[经] 合同惯例
🧩 词语组成解析
a. 契约的\\n[经] 契约的, 契约性的
🗣️ 情景例句
If someone doesn't buy it before then,
如果在此之前没有人买走的话。
How long have you lived here?
你住在这里多久了？
He is ill in bed.
他卧病在床。