劍橋詞典in the US, an expensive phone number that begins with 900, provided by companies offering services such as chatlines （美國(guó)的）900號(hào)碼（由提供電話(huà)聊天之類(lèi)服務(wù)的公司開(kāi)通的以900開(kāi)頭的高收費(fèi)電話(huà)號(hào)碼） 返回 900 number