在人工照明发明之前，太阳是主要的光线来源，人们的夜晚时间都是在(相对)黑暗中渡过。
Until the advent of artificial lighting, the sun was the major source of lighting, and people spent their evenings in (relative) darkness.
完成你的学士学位或者学习MBA的课程，即使那意味着有4年的夜晚时间在学校度过，但它将极有可能使你获得成倍的回报。
Finishing your bachelor's or going for an MBA, even if it means four years of night school, is an investment you'll likely get back many times over.
温暖的白天和凉爽的夜晚是种植美味胡萝卜的最佳时间。
Warm days and cool nights are the best time to grow great delicious carrots.
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