on-demand
剑桥词典
- available when a customer wants or asks for something
应顾客要求即可提供的，随选的
They will sell a voice recognition product as an add-on , on-demand service for their users . 他们会将一个语音识别系统作为附加的随选服务提供给用户。
In the library's warehouse , robots would manage stock and fetch books on an on-demand basis . 在图书馆仓库里，机器人会管理存贮并取出顾客随选的书。
able to be watched at any time
可点播的
Most people in this region do not even have television , let alone on-demand movies . 这个地区的大部分人连电视机都没有，更别说点播电影了。