例句引用自http://www.taipeitimes.com/News/lang/archives/2006/03/03/2003295606/print
pitch n. 音調
例:The pitch of Sarah's voice is so low that strangers who call her on the phone sometimes mistake her for a man.(莎拉的聲音如此低沉,打電話來的陌生人有時會誤以為她是男生。)