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Water
水
Water is a vital component of our diets,even though it's not considered a specific nutrient.
水是飲食中重要的成分，盡管它沒被當作一種特別的營養物。
Water makes up 50 to 70 percent of an adult's total body weight.
一個成年人體重的50%—70%由水組成。
Without regular top-ups, our body's survival time is limited to a matter of days.
如果沒有定期的補充水，我們只能存活幾天。
Water is essential for the body's growth and maintenance.
水是人體成長和維持身體機能所必需的。
For example, it helps get rid of waste and regulates temperature,and it provides a medium for biological reactions to occur in the body.
例如，它幫助排出廢物，調節體溫，并對身體內的生理反應提供介質。
Water is lost from the body through urine and sweat,and must be replaced through the diet.
水通過尿液和汗液排出體外，必需通過飲食補充。
If you don't consume enough water, your kidneys suffer,causing symptoms such as headaches, tiredness and loss of concentration.
如果沒有喝下足夠的水，腎臟就會受損，引起頭痛，疲勞，注意力不集中的癥狀。
Most healthy adults need between 0.5-3 litres a day,so aim to drink 6-8 medium glasses of fluid daily.
大部分健康的成年人每天需要0.5-3升水，因此每天需要喝6-8杯水。
Beverages such as tea, coffee and fruit juices count towards fluid intake,and may bring with them other nutrients or benefits.
茶，咖啡和果汁這些飲料也可以，可能還帶來其他的營養和好處。
