词汇	steppe degeneration
释义	steppe degeneration 草原退化
随便看	dust collecting installation dust collecting pipe dust collecting plant dust-collecting plant dust-collecting plate dust-collecting point dust collecting sleeve dust-collecting sleeve dust collecting system dust collecting-system dust-collecting system dust collecting systm Dust Collecting Unit dust collection dust-collection dust collection box Dust collection by impinging jets dust collection by sound wave dust collection device dust collection efficiency dust collection equipment dust collection hose dust collection in impingingstream dust collection method dust collection plate