短语词组短语ruderal plant 宅旁杂草;[植]杂草植物ruderal strategy 杂草对策grassland ruderal 草地杂草ruderal annuals 一年生杂草parasitic ruderal 寄生杂草ruderal species 杂草种ruderal soil 杂草土壤ruderal plants 杂草pressing -ruderal device 压杂装置 返回 ruderal