词汇	active roles
释义	active roles 积极作用
随便看	drainage by sand pile drainage by shaft well drainage by shaft wells drainage by suction drainage by surcharge drainage by vertical well drainage by well point drainage by well points drainage by welpoint drainage canal drainage capacity drainage capillary pressure curve drainage catheter drainage catheters drainage catheter with partition wall drainage culvert drainage culvert and sluice drainage culverts and sluices drainage current drainage curtain drainage channel D.rainage channel drainage channel and ditch drainage channels drainage channels of aqueous