The gas , which is sulphur - free , contains 89 - 99 % methane, up to 6 % ethane, and 3 % propane.天然气不含硫, 含甲烷88-99%, 乙烷6%和丙烷3%.The cloud might be snowing ethane snowflakes into methane lakes below.云层可能正在向下面的甲烷湖飘落乙烷雪.BA 1...
我用螺丝刀拧那些该死的螺丝钉时一点也使不上劲儿。I couldn't get any purchase with the screwdriver on the damn screws.他有一股子使不完的劲.He just doesn't know what it is to be tired.她那使不完的精力令我羨慕.I admire her boundless energy....
Secular disequilibrium of uranium can lead to erroneous results.铀的永久不平衡会导致错误的结果.Thus disequilibrium is a mark of waste, and imperfect efficiency of production.因之,不均衡是浪费和生产效率有缺点的标志.This does not explain the initial disequ...