Contractual route
[法] 契约规定的航线
🧩 词语组成解析
a. 契约的\\n[经] 契约的, 契约性的
🗣️ 情景例句
Robbie just went to the store.
Robbie刚去商店。
Sure. We are friends since primary school.
当然，我们从小学就是朋友了。
The question was, which one?
问题是，哪一种气体导致火灾呢？