heavy metal contents的用法和樣例：
例句
- The metal contents in the macrobenthos were slightly higher under forest than in the creek.
在動物總體水平上，林內動物重金屬含量稍高於潮溝動物。 - In the past long time, the total content of heavy metal in the soil was a very important parameter for evaluating the soil contaminating degree.
在過去很長一段時間裡重金屬含量的高低一直都被看作是土壤污染程度的一個重要指標。
