The scattered particles are fanning out from the target. 散射粒子從靶處作扇形散開(kāi)。
Mosquito-repellent incense smoke is selected as scattering particles in the measurement by means of theoretic analysis and making contrast experiments. 在測量中，經(jīng)過(guò)理論分析與對比試驗，選擇了蚊香煙霧作為散射粒子。
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