Acoustical vibration
[机] 声音振动
🧩 词语组成解析
a. 听觉的, 声学的
🗣️ 情景例句
But it is not polite to ask older people their age.
但问老人的年龄是不礼貌的。
I dropped the letter in the mailbox on the corner.
我把信放到角落上的邮箱里。
Whenever Arthur was angry, he would walk out of the room.
阿瑟生气时，就会出去。