外立面还具有一定的实用效益，就像一个太阳屏幕，使建筑保持凉爽和高效节能。
The facade also has some practical benefits and acts like a sun screen, which keeps the building cool and energy efficient.
其母体恒星就像是一个红色的小矮人——比起太阳来实在是又小又模糊。
Its parent star is a red dwarf--a far smaller and fainter object than the sun.
当太阳内部深处形成巨大的磁力环，该处将会产生井喷并突破太阳表面，从而使表面的局部地区温度下降，看上去就像一个暗斑，这就是黑子的形成。
They form where giant loops of magnetism, generated deep inside the sun, well up and burst through the surface, leading to a localised drop in temperature which we see as a dark patch.
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