sulfur cycle [海洋] 硫循环 ; 硫素循环
Archean sulfur cycle 太古代硫循环
biological sulfur cycle 生物硫循环
atmospheric sulfur cycle 大气硫循环
Oxygen isotopes vary with the water cycle, and sulfur with bedrock, so they're location proxies.
氧同位素会随着大气水循环而变化，硫同位素则根据地球岩床的不同而变化，通过它们我们就能确定地理位置。
The microbial community composition of sulfur cycle in Lake Ehai sediments is complex.
洱海沉积物硫循环相关微生物群落组成复杂。
The experiment result which was analyzed with strict statistic method showed that in the composite cycle reducing fuel sulfur content could reduce vehicle exhaust emissions;
运用严格的统计方法对试验结果进行分析，结果表明在综合工况下，汽油中硫的质量含量的降低可以明显地降低车辆尾气的各种污染物排放；
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