at any time that someone wants or needs something:
available when a customer wants or asks for something:
able to be watched at any time:
a service for watching films or TV programmes at any time:
英语词典包含110679条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。