Inalterable
a. 不能变更的
🗣️ 情景例句
Robbie, maybe you should call them，
Robbie也许你应该给他们打个电话，
I'll take it.
我买了。
After taking off, we were flying low over the city and slowly gaining height,
起飞之后，我们在城市上空低低地飞行，然后慢慢爬高。