We cannot exist without air, food, and water.
我们没有空气、食物和水就不能生存。
We cannot exist without food or water.
没有食物或水我们就不能生存。
We cannot exist without air, food and water.
我们没有空气、食物和水就不能生存。
All life is born in water, and so far as we know, life cannot exist without water.
一切生命都诞生于水中，就我们目前所知，生命无法存在于没有水的环境中。
The next unit of water might not even exist if we cannot get smart enough to use our single supply of water well.
如果我们不能有效使用我们仅有的水资源的话，那么下一个单元的水将不复存在。
We cannot live [exist] without food and water.
没有食物和水我们就不能生存。
We know a peaceful world cannot long exist one-third rich and two-thirds hungry.
一个和平的世界不能够有三分之一富裕而三分之二饥饿。
Although the air is invisible, we cannot say it doesn't exist.
空气虽然没有形象，看不见，但不能说空气不存在。
Although the air is invisible, we cannot say it doesn't exist.
空气虽然没有形象，看不见，但不能说空气不存在。
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