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一次能源 yīcì néngyuán
el.	prime energy
IT	primary energy resources
manag.	primary energy (resources)
nucl.phys.	primary energy source
oil	primary energy
tech.	primary energy sources
wind.	primary energy resource
一次能源从自然界直接开采利用的煤炭、石油、天然气、木材、水力、原子能、风力、潮汐、太阳能及地热等能源，统称为一次能源，又称天然能源 yīcì néngyuán
ecol.	primary energy; primary energy source

一次 能 源 : 6 phrases in 6 subjects

Ecology	1
Economics	1
Electronics	1
Forestry	1
Refrigeration	1
Technology	1