人工降雨很依赖环境条件，比如温度和云层成分。
Cloud seeding is also very dependent on environmental conditions like temperature and cloud composition.
由于不同矿山的地质条件等因素变化很大，矿井水的杂质成分与含量也有很大差异。
The components of the coal mine water is various obviously according the mine geologic condition.
由于不同矿山的地质条件等因素变化很大，矿井水的杂质成分与含量也有很大差异。
The components of the coal mine water is various obviously according the mine geologic condition.
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