Downwardmodulation
[电] 向下调变
🗣️ 情景例句
Building a city can be a disaster for the environment.
新建一个城市对于环境来说可能是一场灾难。
Our packing charge includes $1 for the drum, which sum will be credited on return.
包装费中有1美元是包装桶的费用，此费用在桶还给我们时可退回。
It is now being used indifferently for both.
人们现在正漫不经心地把知识用于这两个方面，