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.
当然，我们必须用它来喝，做饭，洗衣，清洁等，但我们必须记住，不使用它历。
Of course, we have to use it to drink, cook, wash, clean and etc. But we must remember not to use it extravagantly.
太阳，主人，招待约瑟夫与中国酒，说： ：“根据我们的定制，姐夫来妻子的祖国第一次必须喝三杯酒。
Sun, the host, entertained Joseph with Chinese wine, saying, "According to our custom, a brother-in-law coming to his wife's native country for the first time must drink three cups of wine."
如果有人想到达喝的这一边，必须要经过我们的营地。
If someone wanted to reach the river at this point, he had to past our camp.
如果有人想到达喝的这一边，必须要经过我们的营地。
If someone wanted to reach the river at this point, he had to past our camp.
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