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| mercury contamination; mercury pollution | |||
| mercury contamination The presence and release into the air, water and soil of mercury, a naturally occurring heavy metal element, by both natural occurrences such as vaporization and human activities such as burning coal, mining and smelting (天然重金属元素汞,一般通过自然现象,如蒸发和煤炭燃烧、采矿及冶炼等人类活动出现和释放到空气、水和土壤中。) | |||
| 汞污染: 7 phrases in 3 subjects |
| Ecology | 3 |
| Technology | 3 |
| Water resources | 1 |