游泳池边的妈妈总是给他们的孩子涂上厚厚的防晒霜而且很警惕的观察孩子是不是有被阳光灼伤的征兆。
Poolside mothers slather their children in buckets of sun block and vigilantly watch for the first signs of sunburn.
然而便携电脑及类似的便携式信息物件需要大量电源—笨重的电池—才能使液晶显示屏工作，而且液晶显示屏在明亮的阳光下读看很费力。
But laptops and similar portable information devices require a lot of power-and heavy batteries-to keep their LCD screens operating. And LCDs are not easy to read in the bright light of the sun.
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