... time-like curve 类时曲线 Closed time-like 封闭类时曲线 time-Like Lines 所谓封闭型的类时间线 ...
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建立了R_2 ~ 4空间中曲线的局部理论，特别地，我们考虑了类时曲线中的一些特殊曲线。
We established the local theories of the curves which are in the semi-Euclidean 4-space, especially, we considered some special ones of the timelike curve.
曲线显示当电磁波由电导率大的介质向电导率小的介质传播时，将发生类全反射。
It is showed that quasi-total reflection would occur when the electromagnetic wave traveled f.
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