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。

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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.

该装置的特点是调速范围大，工作介质温度高，可以同时对泵轴进行径向和轴向加载。

youdao

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.

该装置的特点是调速范围大，工作介质温度高，可以同时对泵轴进行径向和轴向加载。

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