separations离析物separationn.分离；分居；缺口；分隔线；[化]离析；【航】间隔separation fracture分离剥裂,张裂隙separation positive分色正片separation of niche龛分离,小生境分离separation movement[法] 分裂主义运动separation material析出物separation reaction分离反应separation of roots隔根法separation coupling可拆联轴节separation cylinder分离圆柱面separation membrane分隔膜