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(dòng)物總體水平上，林內動(dòng)物重金屬含量稍高于潮溝動(dòng)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(guò)去很長(cháng)一段時(shí)間里重金屬含量的高低一直都被看作是土壤污染程度的一個(gè)重要指標。
