地轴是我们虚构的穿过地心的一个倾斜的直线轴。
The tilt of the earth's axis, that imaginary pole that runs through the center of the earth.
它们并非经常发生，大约只有一年一次，因为太阳，月亮的轨道相互倾斜，它们很少能排成一条直线。
They don't happen often-only about once a year-since the tilted orbits of the sun, moon, and Earth make their alignment rare.
图像是倾斜的，这表明它是在国际空间站(ISS)上由一个倾侧视角，而不是从“直线”(或者说天底)视角进行拍摄的，后者是卫星上搭载的自动探测器拍摄的照片的独有特点。
The image is oblique, meaning that it was taken from a sideways viewing Angle from the International Space Station ISS, rather than from a "straight down" or.
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