Many, though, form a ring like Saturn's at a distance of 36,000km, the place at which an object takes 24 hours to orbit the Earth and thus hovers continuously over the same point of the planet.

尽管，许多卫星在36000千米处形成一个类似土星光环的环，但这个高度的卫星都需要花费24小时绕地球一圈。因此，它们一直在地球上空的同一点盘旋。

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The most seismically active region on the planet, the Ring of Fire has triggered countless quakes, volcanic eruptions and tsunamis.

火圈带中已经发生过无数次地震、火山爆发和海啸。

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The internal teeth of the ring gear mesh with the planet gear teeth. Thus, the ring gear rotates with the other parts of the planetary gear system.

内齿圈的内齿与行星轮的齿啮合。因此，内齿圈随着行星轮系统的其他配件旋转。

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Yet scientists are already speculating that this planet may be of a similar size to Jupiter and have its own ring system.

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