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1·The symmetric values about the imaginary axis 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.

地球的自转轴与黄道面呈一定角度。黄道面是地球公转轨道所在的一个假想平面。

4·The Earth spins on an imaginary line called an axis that runs from the north pole to the south pole, while also orbiting the sun.

地球绕一个贯穿南极点和北极点的假想轴旋转，这个假想轴称为地轴。 同时也绕太阳公转。

5·AXIS, an imaginary straight line or an actual physical component (such as an axle) around which a body can rotate.

轴线，可让物体围绕着作旋转运动的一个想像的直线或实际存在的部件(如轴)。

6·It turns around its axis, an imaginary line that goes straight through the middle of the earth from the North Pole to South Pole.

它绕着自己的轴旋转；地轴是一条想像的穿过地球中央的、从北极到南极的线。

7·When an air jet is allowed to expand freely, the moving air is contained within an imaginary cone whose axis is coincident with that of the air jet.

当一股气流自由膨胀时，运动着的气流构成一个假想的圆锥体，其轴线与气流的轴线相重合。