harmful metal

• 有害金属

harmful metal的用法和样例：

例句

1. Calcium citrate is also used as a water softener because the citrate ions can chelate unwanted metal ions.
   柠檬酸钙也可以用来作为水柔软剂，因为柠檬酸离子螯合有害金属离子。
2. The pro and con of using these methods were analyzed, and the application of other possible methods of harmful metals in tobacco was previewed.
   作者简述了各种方法的优缺点，展望了其它有害金属检测方法在烟草中的应用。