Second, Jupiter's enormous mass prevents most Sun-bound comets from penetrating the inner solar system.

其次，木星的巨大质量阻止了大多数与太阳结合的彗星穿透太阳系内部。

youdao

Mars's orbit around the Sun is the fourth fastest orbit of all the solar system planets.

在太阳系所有行星中，火星绕太阳的轨道速度第四快。

youdao

The goal was to measure the AU; then, knowing the orbital speeds of all the other planets around the Sun, the scale of the Solar System would fall into place.

目标是测量 AU；随后，当我们知道了所有围绕太阳的其他行星的轨道速度，对太阳系的规模就有充分的认识了。

youdao

A common design looks like a high tunnel.Unlike a greenhouse, which uses a heating system, a hoop house is heated by the warmth of the sun.

VOA: special.2009.12.22

Yet the cheap system processed a trade in 50 milliseconds, one-fourth the time needed by the Sun system.

FORBES: The New Barbarians

An open source team just discovered the first planet known in a 4-sun system, just by parsing public data!

FORBES: Stairway to Heaven: Another "Giant Leap" for Mankind

Similarly, one camp maintains that temperatures are rising dramatically with unspeakable portents, while the other thinks what has happened is entirely a result of undefined internal oscillations in the earth-sun climate system, and that there is virtually no human component to climate change.

FORBES: Global Warming: Hotheads, Flatliners and Lukewarmers, Part One