Acoustical vibration
[机] 声音振动
🧩 词语组成解析
a. 听觉的, 声学的
🗣️ 情景例句
Those were great days and we were very happy.
那些日子美好极了，我们过得很幸福。
You'll drop it, if you don't teke care.
你不专心的话，就会掉下。
which we may call respectively the tough and the gentle.
我们分别称之为强硬法和温柔法。