词典释义：
双语例句
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If life looks cheery in spite of the gloomy weather, mass job insecurity and the suspicion that spending hours on Facebook is mangling your mind, you might want to thank your brightside gene.
尽管天气阴沉，山一样的工作让人不安，疑心花费数小时在Facebook网站上会损伤你的才智，但生活看起来仍很愉快——如果这样，你应该感谢你的“光明基因”。