火花发火喷油式发动机
spark-ignition fuel-injection engine
B的物质的量浓度
amount-of-substance concen-tration of B
矿物质的物理性质
physical character of minerals
蒸汽与生物质的质量比
mass ratio of steam and biomass
生物爆发
eruption point of biology
Ostracoda
易燃易爆物质
flammable explosive material