我们必须把剩下的牛奶留着明天喝。
譬如，在几何学里我们必须假定，一个圆周的圈线是由无限多喝无限小的直线形成的。
Thus in geometry you are told to conceive the circumference of a circle as formed of an infinite number of infinitely small straight lines.
可是虽然我们的人生是被束缚的，我们必须服从自我需要，我们不可能不吃不喝。
But although our life was tie up of, we must obey the ego demand, it is impossible for us tos do not eat not to drink.
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