The sun is the major source of energy for our planet.

太阳是我们星球能量的主要来源。

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The sun basically provides Earth with virtually unlimited source of energy everyday, but the problem has always been how do we tap this source of energy.

基本上，太阳每天为地球提供几乎无限的能源，但问题一直是我们该如何利用这能源。

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The sun is a wonderful source of energy.

太阳是一种很好的能量来源。

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Skeptics have argued that it is absurd to downplay the role of the sun, as it is the energy source driving the entire climate system.

FORBES: Did CLOUD Just Rain on the Global Warming Parade?

These approaches aim to capture our ultimate energy source: the sun.

WHITEHOUSE: Engage and Connect

The French nuclear giant Areva bought a company that taps the biggest nuclear energy source in the solar system: the sun.

FORBES: Areva Taps The Other Nuclear Source: The Sun