次生消光效应
secondary extinction effect
分次照射的生物学效应
Biologic effect of fractional irradiation
次生生物-热解混合成因气
secondary biogenetic-pyrogenation gas
直击雷和二次效应
direct hitting thunder and second result
轴力二次效应
the second effect of the axial force
主次效应
primary and secondary effect