oxygen demand的用法和樣例：
例句
- The exercises which occur without oxygen are called anaerobic.
運動中不需要氧的就是無氧運動。 - An animal is dependent on the oxygen which he inhales for his life.
動物離不開氧氣，為了生存需要吸氧。 - The results showed that magnesium hydroxide had good effect for decoloring and suspended substance removal,meanwhile,removal rate of chemical oxygen demand was also quite high.
研究結果表明，氫氧化鎂在印染廢水的處理過程中，具有良好的脫色效果和懸浮物的去除效果，對化學需氧量的去除率也相當高。
