스타일 기능을 연습할 영어 문장 01입니다. 

Water is a common chemical substance that is essential to all known forms of life. About 70% of the fat free mass of the human body is made of water.

To function properly, the body requires between one and seven liter of water per day to avoid dehydration; the precise amount depends on the level of activity, temperature, humidity, and other factors.

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