近似测量 meaning in English

approximate measure

Then we also presented the simple way to solve the polydisperse powder concentration by calculate it as monodisperse powder , compared the measurement results which were got at different diameter , scattering angle and distribution
然后本文还分析了将具有尺寸分布尘粒的浓度测量按单一粒径尘粒进行近似测量的计算情况，并比较了它们在不同粒度、不同测量角度、不同分布参数情况下的差异。