“乙烷”的英语？

天然气不含硫, 含甲烷88-99%, 乙烷6%和丙烷3%.The gas , which is sulphur - free , contains 89 - 99 % methane, up to 6 % ethane, and 3 % propane.某些苯代 ( 或多苯 ) 环氧乙烷是制取带苯环 ( 或二苯 ) 碳烯的极好原料.Phenyl ( or polyphenyl ) substituted epoxides serve a...