1. Never pipe the discharge line directly into a drainage ditch, sewer or sump. 不要把排泄管直接插入排泄地漏、污水管或污水坑里。
2. Now it has the capacity of supplying traffic, electricity, water, communication and drainage. 目前己达到交通、供电、供水、通讯、排水等“五通一平”能力。
3. Check around construction sites or do-it-yourself improvements to ensure that proper backfilling and grading prevent drainage problems. 检查建筑场地周围还是自己做改进，以确保适当的回填和等级，防止排水问题。
英英解释
n.
1. emptying something accomplished by allowing liquid to run out of it
