1. 甲烷系：methane oil 甲烷族石油 | methane series 甲烷系 | methane snow 甲烷雪
2. 烷系：methane recorder ==> 瓦斯记录器 | methane series ==> 烷系 | methane sulfonate phentolamine ==> 甲磺酸酚安拉明
noun
1. a series of non-aromatic saturated hydrocarbons with the general formula CnH(2n+2)
Synonym: alkane series alkane paraffin series paraffin