Midfrequency
中频
🗣️ 情景例句
I know it well.
我对它熟得很。
Idleness is the key of beggary.
懒惰出乞丐。
A sound made by tapping on the hull of a ship will be reflected from the sea bottom,
敲打船体所发了的声音会从海底传回来，