Acoustical measurment
[電] 音響量度
?? 詞語組成解析
a. 聽覺的, 聲學的
??? 情景例句
Never say die.
永不氣餒！
He has not come in yet.
他還沒有來。
He can't make it today. He has to stay at home.
他今天不行了。他得呆在家里。