Effectivity
n. 有效, 功效
🗣️ 情景例句
This place can be developed
我们可以拓展这个地方
We can't see it very well.
我们不能看得很清楚。
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。