1. After the fragments' entry, these analyses revealed unprecedented traces of sulfur. 在碎片进入之后，这些分析揭示了前所未有的硫磺痕迹。
2. The level of sulfur dioxide gas above Venus's clouds shows large and very frequent fluctuations. 金星云层上方的二氧化硫气体水平显示出巨大且非常频繁的波动。
3. It is quite possible that these fluctuations, the huge increase and decrease of sulfur dioxide, happening again and again. 很有可能这些波动，二氧化硫的大量增加和减少，一次又一次地发生。
4. These pollutants are called aerosols and they include soot as well as compounds of nitrogen and sulfur and other stuff into the air. 这些污染物被称为气溶胶，它们包括煤烟以及空气中氮、硫和其他物质的混合物。
5. New coal-burning plants usually comply with the law by installing expensive equipment to filter sulfur dioxide from their emissions. 新的燃煤电厂通常安装昂贵的设备来过滤排放的二氧化硫以遵守法律。
