800 number

劍橋詞典

in the US, a free phone number that begins with 800, provided by companies or other organizations offering advice or information
（美國(guó)的）800號(hào)碼（公司企業(yè)或其他提供諮詢或信息服務(wù)的機(jī)搆開(kāi)通的以800開(kāi)頭的免費(fèi)電話號(hào)碼） 返回 800 number