Steranes and terpanes exist in saturatedhydrocarbon component of oil and source rock, and they are usually identified by gas chromatogram-mass spectrum.
甾萜类化合物存在于原油和生油岩的饱和烃组分中，通常用色谱-质谱法鉴定。
2
It is a saturatedhydrocarbon belonging to the alkane homologous series.
是饱和碳氢化合物，属于烷烃同系物。
3
The main components were saturated fatty acid esters (33.834%) and hydrocarbon (22.031%).