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...
The rainy season in the Andes normally starts in December.安第斯山区的雨季通常在12月份来临。I'll put the rest in the bank for a rainy day.我要把余款存入银行以备不时之需。Rainy weather brings blessed relief to hay fever victims.雨天会给枯草热患者带来欣喜,减轻他们的痛...
By measuring the motion of the galaxies in a cluster, astronomers can infer the cluster's mass.通过测量星系在一个星系团内的运动,天文学家们可以推定这个星系团的质量。They turned their telescopes towards other nearby galaxies...他们把望远镜转向附近其他星系。Space fli...
N son - carrier waves were modulated respectively with N paths symbol and got FDM signal.N路符号分别对N个子载波调制,得到FDM信号.Rapid prototyping manufacturing in the ice pattern is actualized through FDM and separate ejection.采用FDM方法、离...