However, if an eclipse occurs while the Moon is on the far side of its elliptical orbit, it appears smaller than the Sun and can't completely cover it.

但是如果日食出现在月球处于它的椭圆轨道远地点的时候，它显得比太阳小而无法完全遮盖住太阳。

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The Moon's elliptical orbit means its distance from the Earth is not constant.

月球椭圆型的轨道意味着它到地球的距离是变化着的。

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It orbits its star every 4.7 days, in a moderately elliptical orbit at a mean distance of only 0.04 AU (one tenth of Mercury's distance from the sun).

它每4.7天环绕恒星一周，其轨道为一个适度的椭圆，平均距离仅0.04个天文单位(为水星距太阳的十分之一)。

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The perigee of its elliptical orbit (the closest point it comes to Earth) has actually risen slightly, and is just above 200km.

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Its elliptical orbit actually crosses Neptune's path, yet the timing of the two planets' respective motions ensures that, like figures in a clockwork model, they never collide.

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Phobos-Grunt launched successfully on its Zenit rocket from the Baikonur Cosmodrome and was dropped off into an elliptical orbit with an apogee (farthest point from Earth) of 345km.

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