look back、 look behind、 look up、 look down的区别

look down,look away,look out,look up的区别 look after,look up,look for,look at的区别 look at/look for/look up/look after的区别? 英语翻译look around look out look up look down look up与look at 的区别 look though,look up的区别 look up和look out的区别 look up与look for的区别 look up和look for的区别 look into look for look up的区别 look up to和look down look down,look back,look out of 用汉语翻译