roof rainwater system的用法和樣例：
例句
- The inner rainwater system of large factory buildings is analyzed and discussed in this paper.And the personal opinion is put forward.
對大型廠房內排雨水系統水流情況進行分析，對系統設計進行了探討，提出了個人的見解。 - The rainwater harvesting system created by International Development Enterprises uses pipes to collect water from the roofs of buildings.
收穫雨水系統由國際發展企業創立，它用管子在建築的房頂收集雨水。
