While the reduction of the initial oxidized products on pyrite surface such as polysulphide and free sulphur can improve its hydrophilicity.

同时，黄铁矿表面初始氧化产物如单质硫和多硫化物被还原，亲水性增强。

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The near-term climate benefits of a global dash for sulphur-free gas may thus be smaller than might be expected.

如今全球正在争先恐后地开采无硫天然气，这种做法短期内也许不能像预期的那样显著改善全球气候。

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It appears that AQ is still the most cost effective sulphur free accelerator for alkaline pulping, albeit of limited applications.

蒽醌似乎是无硫碱法制浆的最有效的催化剂，尽管应用还比较少。

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Dr Alamaro wants to use a gas-burning, rather than a coal- or oil-burning plant, because the exhaust produced by burning natural gas is free from sulphur dioxide, which plants hate.

ECONOMIST: Horticulture