alternativeadj.两者择一的；供选择的；非主流的n.二者择一；供替代的选择alternative clause可供选择的条款alternative series交错级数alternative models模式选择alternative source择一信源alternative tensor交错张量alternative counts[法] 交替的罪项Alternative ballad另类歌谣Alternative mating循环配对交配alternative duties[经] 选择税alternative danger[法] 危急中力求脱险的行为