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...
He keeps forgetting the words and the song is a sprawling mess.他老是忘词，歌被唱得乱七八糟。The sprawling city contained some 4m people.这个不断扩张的城市容纳了约400万人口。He was sprawling in an armchair in front of the TV.他伸开手脚坐在电视机前的一张扶手椅上。...
I had tuberculosis and was told I'd be in the sanatorium for two years.我得了肺结核，被告知要在疗养院呆两年。She is now at Lu - shan sanatorium and endeavouring to pull round.她目前在庐山休养所,力图把身体养好.I had TB and spent several months in a sa...