collec- tion system的用法和樣例：
例句
- Through the provision of a new sewerage system, some progress is being made in tackling the problem.
在新污水收集系統啟用后，維港的水污染問題已有改善。 - In the coming year we will also be seeking the funding to extend the collection system to the rest of Hong Kong Island.
我們更會在來年申請撥款，以期把污水收集系統的範圍擴大，伸展至港島其他地方去。
