light fraction是什么意思

用法例句

Due to the large grain size of the samples,the light fraction loss of the samples before and after crushing is greatly reduced.

因样品粒径大,大大减少了样品在粉碎前、后轻馏分的损失,较好地保留了烃源岩分散有机质中轻馏分的原始面貌。