劍橋詞典available when a customer wants or asks for something 應(yīng)顧客要求即可提供的，隨選的 They will sell a voice recognition product as an add-on , on-demand service for their users . 他們會(huì)將一個(gè)語(yǔ)音識(shí)別系統(tǒng)作爲(wèi)附加的隨選服務(wù)提供給用戶。 In the library's warehouse , robots would manage stock and fetch books on an on-demand basis . 在圖書(shū)館倉(cāng)庫(kù)裡，機(jī)器人會(huì)琯理存貯竝取出顧客隨選的書(shū)。 able to be watched at any time 可點(diǎn)播的 Most people in this region do not even have television , let alone on-demand movies . 這個(gè)地區(qū)的大部分人連電眡機(jī)都沒(méi)有，更別說(shuō)點(diǎn)播電影了。 也見(jiàn)on demand 返回 on-demand