spindle apparatus短语¹⁴⁴⁹⁷²⁺² 基本例句 纺锤体 The first stage of mitosis, during which the chromosomes condense and become visible, the nuclear membrane breaks down, and the spindle apparatus forms at opposite poles of the cell. 前期阶细胞减数分裂的第一个阶段，其间染色体浓缩且能被看见，核细胞膜衰弱，纺锤体在细胞的相对纺锤极形成。 hotdic