第 一类为“两极论”（polar solution）或“中间制度消失论”（the hypothesis of the vanishing intermediate regime）。
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polar coordinate solution 极坐标解答
polar coordinates solution 极坐标解答
dilute polar organic solution 极性有机物稀溶液
The solution type also had significant effect on the selectivity of 1-bromo-hydrocarbon, the no polar solution was favorable for the selectivity.
溶剂对1-溴代烷烃的选择性也产生显著的影响，非极性溶剂有利于1-溴代烷烃选择性的提高；
List one of your fears. Beside it, list the polar opposite of your fear. That is, the preferred solution. For example.
写下一件你恐惧的事。在它旁边写这件事的对立面。这就是最优的解决方式。例如。
With single polar SPWM(Sine Pulse Width Modulation), the whole solution of hardware and software is presented based on the resource of the DSP controller chip.
该系统采用单极性调制的SPWM方式，根据DSP芯片的各类资源给出了一套具体的数字化实施方案。
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