n. interconversion
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我们假设没有互变发生。
We assume that no interconversion takes place.
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在这种情形中，有两种几乎不能互变的变态。
There are two almost non-interconvertible modifications .
该文给出并证明球面与单叶旋转双曲面的轨迹互变特征。
This thesis has railed and proved the characteristics of locus mutual change about spherical surface and hyperboloid of the one sheet of revolution!
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