担轮幼虫期 meaning in Chinese

trochophore stage

Method of metaphase chromosome preparation from scallop was optimized . the gill tissue and embryo before the stage of trochophoro larve were proved to be good materials for chromosome preparation , while excellent chromosomes can hardly be prepared from the gonad tissue or embryo after the stage of trochophoro larve
确定成体扇贝鳃丝或者担轮幼虫期的早期胚胎是较为优良的染色体制备取材来源，而性腺材料、进入d型幼虫期以后的扇贝胚胎则较难以制备优良的染色体分裂相。