14:49 duration 14 minutes 49 seconds
水質污染和污水處理 (中文字幕可供選擇)
本節目簡介水污染的主要成因和現行處理污水的方法。
20:03 duration 20 minutes 3 seconds
Water Pollution
1. An introduction to the sources of water pollutants; 2. An introduction to the sewage treatment strategy in Hong Kong; 3. An explanation of the methods of sewage treatment for compiling with the…