different 是形容词‘ 不同的’,作定语,表语等difference 是名词‘ 不同’ ,作主语,宾语等,如This box is different from that one .这只盒子与那只不同.There are some differences between the two boxes .这两只...用法上再看看我的回答，我已经补充了difference为何要加s可数名词的复数