The symmetric values about the imaginaryaxis of zero-poles which the unstable process lies in the open and closed right-half plane are defined as their mirror-injection.
非稳定过程在开右半平面的零极点关于虚轴的对称值称为该零极点的镜像映射。
2
The tilt of the earth's axis, that imaginary pole that runs through the center of the earth.
地轴是我们虚构的穿过地心的一个倾斜的直线轴。
3
The Earth's axis of rotation is tilted in relation to the ecliptic plane, an imaginary surface through Earth's orbit around the sun.