Can be seen that by adding these trace metal elements, can greatly increase the amount of bad handling of liquid, while prolific gas, thereby enhancing the rate of methane production.

可见，通过添加这些微量金属元素，可以大幅度的提高糟液的处理量，同时可多产沼气，从而提高沼气产率。

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Moreover, the processing of ores introduced poorly controlled changes in the concentrations of minor and trace elements in the resulting metal.

此外，对矿石的加工过程也在随之而形成的金属中引入了某些有失控制的次要和微量元素含量的变化。

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It is necessary for us to measure and control the heavy metal elements in Chinese traditional medicine, as harmful trace elements have side effects found by this study.

也反映了中药中有害微量元素存在着一定的不良反应，必须对中药中的重金属元素进行检测和控制。

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