regressiveadj.退步的；退化的；递减的(税率)；回归的regressive nature累退性regressive scheme递减计划regressive erosion下切,向源侵蚀regressive species退化种regressive overlap海退退覆,退覆regressive formula回归公式regressive burning减面燃烧regressive bedding海退层理regressive sequence海退层序regressive follicle退行卵胞