短语词组短语laggard pupils 落后的学生laggard manufacturers 吊车尾制造商laggard student 详细翻译Laggard Outperforming 落后股的上涨laggard reason 落后原因Laggard d 迟钝的laggard transformation 转变滞后性laggard chromosomes 落后染色体 返回 laggard