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alkane ['ælkein] n
gen.	烷属烃; 链烷链烷烃; 烃类
chem.	链烷烃
ecol.	链烷烃; 石蜡烃; 烷
met.	链烷 (CnH2n+2)
oil	链烷
space	烷烃
alkane Paraffins. A homologous series of saturated hydrocarbons having the general formula CnH2n+2. Their systematic names end in -ane. They are chemically inert, stable, and flammable. The first four members of the series (methane, ethane, propane, butane) are gases at ordinary temperatures; the next eleven are liquids, and form the main constituents of paraffin oil; the higher members are solids. Paraffin waxs consists mainly of higher alkanes adj.
environ.	烷烃 (链烷烃，同源系列的饱和碳氢化合物，其通式为CnH2n+2。该体系化学物的英文名称都以-ane结尾。它们具有惰性、稳定性和可燃性。该体系的前四个烷烃化合物(甲烷、乙烷、丙烷、丁烷)在常温下为气体；后十一个为液体，是石蜡油的主要成分。石蜡主要由高烷烃化合物构成。)

alkane : 46 phrases in 8 subjects

Aviation	1
Chemistry	5
Ecology	2
Oil / petroleum	14
Perfume	2
Technology	18
United Nations	1
Water resources	3