a tiny granule in the cytoplasm that is where protein synthesis takes place under the direction of mRNA
microsome详细解释
mi.cro.some n.（名词）A small particle in the cytoplasm of a cell, typically consisting of fragmented endoplasmic reticulum to which ribosomes are attached.微粒体：细胞质内的小颗粒，通常由核蛋白体附着的零碎内质网组成 【引伸】 mi.croso.mal
