首頁›Browse›P›plumb lineplumb line編輯正在努力提供更完整的內容，建議 20 分鐘後再回來看看plumb lineplumb line — 名詞名詞1. a line with a weight at the end used to check vertical alignment1.名詞釋義鉛垂線a line with a weight at the end used to check vertical alignment例句The builder used a plumb line to ensure the wall was straight.