第一，从现在开始到2020年必须使太阳能具备竞争力也就是有大批生产的水 平。

The first, from now until 2020, must make solar competitive at the mass-production level.

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第一，有直接和间接的太阳能。

First, there is direct and indirect solar power.

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第一个是被动的太阳能发电系统。

The first one is a passive solar power system.

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最近，一架太阳能飞机进行了第一次升空飞行。

Recently, a solar powered plane took to the for the first time.

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最近，一架太阳能飞机进行了第一次升空飞行。

Recently, a solar powered plane took to the for the first time.

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