词汇	downtownian epoch
释义	downtownian epoch 当唐世上志留纪
随便看	water resource deficit water resource definition water resource demand water resource demand management water resource demonstration water resource destruction water resource development water-resource development water resource distribution water resource dynamics water resource economics water resource efficiency water resource endowment water resource environment water resource environnment water resource evaluation water resource exploration water resource facilities water resource fee water resource fees water resource field water resource fight water resource file management water resource for irrigation water resource heat pump