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clean fuel
auto. 洁净的燃油
ecol. 清洁燃料
energ.ind. 无公害燃料; 洁净燃料
clean fuels
oil 清洁燃料
clean fuel
: 18 phrases in 8 subjects
Automobiles2
Aviation1
Business1
Chemistry1
Electronics5
Energy industry4
Oil / petroleum2
Technology2