Scattering and absorption both cause extinction of light; but in a negligibly absorbing medium, extinction would be primarily by scattering.
散射和吸收都会引起消光，但在一个可以忽略吸收的介质中，消光主要由散射造成。
2
Attenuation is the result of two processes: scattering and absorption.
衰减是两个过程的结果：散射和吸收。
3
You have what we call a total cross section which is the total probabilities of either scattering or absorption. These are the two phenomenon that we are talking about.