词汇	trenching sampling
释义	trenching sampling 取法取样
随便看	extensive function extensive funds Extensive funds will be needed extensive games Extensive game with perfect information extensive gateway protocol extensive grassland extensive grazing system extensive green roof extensive growth extensive growth model extensive headlines extensive hearing ability extensive hemorrhage extensive husbandry Extensive hysterectomy extensive immigration extensive increasing extensive inferior myocardial infarction extensive influence extensive inquiries Extensive integral extensive interpretation extensive interview extensive intestinal infarction