Water is our simplest nutrient. It requires no more preparation than turning on a tap. We know when we need to drink it because we feel thirsty. Fully functioning adults tend not to forget to drink enough water to survive.
对我们来说,水是最简单的养分。它不用置备,只要拧开水龙头就好了。我们知道什么时候需要喝水,因为我们会觉得口渴。功能正常的成年人不会忘了喝足够的水以保证自身的存活。
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