The sulfide (especially troilite) contained in coal seams is representative a kind of strong reducing environment.
煤层中含有硫化物（特别是硫铁矿），代表一种强的还原环境。
After strong acid cleaning in a reducing environment, it is recommended that an oxidizing flush be used to ensure oxidation at the surface, removal of organic films, and sanitization of the system.
在还原的环境下的强酸清洗后，推荐用氧化冲洗以确保表面的氧化、有机物膜的去除和系统的消毒。
The maturity of sedimentary organic matter is not high and the depositional environment has strong reducing action.
该海域沉积有机质的成熟度不高，沉积环境具有强的还原性。
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