differencen.差异；不同；差额；分歧vt.<罕见用法> 区别difference counter差值计数器difference readers差别性读者difference schemes差分格式Difference Feature差异性difference -copy差异拷贝difference cloning差别克隆difference spectra差光谱difference measure差分测量Difference protein差异蛋白difference element差动元件