For the P-SV wave travel time, it also can be expressed exactly by a three-term Taylor series in short or moderate spreads.
SV波的传播时间也可用三项泰勒展式表达，在中等及短排列长度时可达到一定精度。
2
The refractive indices at 12 wave lengths in the visible region were measured with the minimum deviation method, showing that KABO is a negative uniaxial optical crystal with moderate birefringence.