从下水沟时常冒出刺鼻的气味。
计划指出排水沟和排水管固定装置，而管道工则构想如何布置管道和连接到总水管和下水道。
The plans show the drains and plumbing fixtures, but the plumber figures out how to route the pipes and hook up to the water main and sewer.
六月二十二日的前一晚，天气预报说会有暴雨，大家很认真的清理了自家的下水道和排水沟，也很尽责的清理了屋檐上的落叶和松针。
On the eve of July 22, we were cautioned to clean our drains and gutters-heavy rain was expected, and so, dutifully, we cleared our eaves of leaves and pine needles.
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