So if you found another star with a pale-blue dot tooling around that yellow star, that blue color and chemical analysis of the planet might give us a strong suggestion of life.
因此,如果你要找到另一颗在黄色恒星附近的浅蓝色的点。这种蓝色和行星的化学分析将会给我们生命的强烈暗示。
When most of us think about solar power, we picture the silicon panels that dot our greener neighbors' roofs, converting the sun's rays directly into electricity.
当我们大部分人想到太阳能的时候,我们就会想象点缀在邻居家更环保屋顶上的硅板,它们正在把阳光直接转化成电。
OK, so now if we have a dot product that's zero, that tells us that these two guys are perpendicular.
所以我们现在有了一个点积为,这告诉我们两者是垂直的。
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