The first stage of mitosis, during which the chromosomes condense and become visible, the nuclear membrane breaks down, and the spindleapparatus 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。
2
This apparatus is enable to change the rotational speed of the pump in a wide range, to heat recirculating water and to load both axial and radial forces on the pump spindle.