The geological signal will be clear from industrial-scale mining, damming, deforestation and agriculture, as well as the concentration of carbon in the atmosphere and nitrates in the oceans.
工业规模采矿、建水坝、砍伐和农业，以及大气中的碳浓度上升和海洋中的氮浓度增高都是明显的地质学标记。
The reasonable mining design should avoid and relieve the stress as far as possible the high degree of concentration.
合理的开采设计应尽量避免和解除应力的高度集中和发生因应力升高而引起的危险。
In the process of mining, it is very important for mining safety to monitor gas concentration.
在煤炭开采过程中，井下瓦斯浓度的测量对煤矿安全生产非常重要。
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