This effect is because the iris, crawled back into the angle of the anterior chamber of the eye, interferes with drainage of aqueous humor . 这是因为虹膜退缩在眼前房内，妨碍了房水的引流。
Conditions that are correlated with accelerated deposition include drainage area, gully development, and texture of source material . 与加速沉积有关的条件包括流域面积，沟壑发育状况和土壤结构等。
What little grass there was in the yard was plastered sparsely down on the ground, the way the drainage water had left it . 院子里那一点点青草现在稀稀拉拉紧贴在地面上，就象是阴沟水流过以后那样。
In drainage of agricultural lands, a filter or gravel envelope is used to prevent the entrance of fine sand and silt into the drains . 在农田排水中常常采用砾石或过滤层来防止粉细砂和泥沙进入排水沟。
Gis - based urban drainage pipe network information system 的城市排水管网信息系统
Drainage improvement in east kowloon - package b 东九雨水排放系统改善计划b部分
Tapered drilling method for drainage holes in crooscut 石门排放钻孔锥体施工方法
Drainage works along yuen long highway northern side 元朗公路北面污水渠工程情况
5 , applicable for the drainage of air - port and freeway 5适用于机场高速公路排水
Application and popularization of upvc drainage pipe 排水管在工程中的应用与推广
