Aac
abbr. 自動振幅控制（automatic ampltiude control）
??? 情景例句
With great tact, Lily said that it was time for her to go.
莉莉機智地說她該走了。
Do you have any rooms?
你有房間嗎？
The inspector began to look for fingerprints, while the constable checked that the front door locks had not been forced,
巡官開始搜尋指紋，警察經檢查發現大門鎖頭并無撬過的跡象。