Water is one of the most important things we need to stay alive, even though we don't call it a nutrient.
水是我们维持生命所需最重要的物质之一，尽管我们并不把它称为营养素。
Did you know that water makes up more than half of our body weight?
你知道吗？水占我们体重的一半以上。
In fact, 50-70% of an adult's body is water!
事实上，成年人体内有50%到70%是水！
Without drinking water regularly, humans can only survive for a few days.
如果不定期饮水，人类只能存活几天。
If we don't drink enough water, our kidneys (肾藏) can't work properly.
如果我们喝水不足，肾脏（肾藏）就无法正常工作。
When this happens, we might get headaches, feel tired and have trouble concentrating.
这时我们可能会头痛、感到疲倦，并且注意力难以集中。
How much water should we drink?
我们每天应该喝多少水呢？
Most healthy people should drink about 6 - 8 glasses of fluid every day.
大多数健康的人每天应该喝大约6到8杯液体。
This can be anywhere from 0.5 to 3 litres.
这相当于0.5升到3升不等。
The good news is that we don't have to drink just plain water - drinks like tea, coffee and fruit juice also count!
好消息是，我们不一定非得喝白开水——像茶、咖啡和果汁这样的饮料也算在内！
These drinks can even give us extra nutrients that are good for our body.
这些饮料甚至还能为我们提供对身体有益的额外营养。
Remember: Just like you charge your phone battery when it's low, you need to keep “recharging" your body with water throughout the day to stay healthy!
记住：就像你在手机电量低时给它充电一样，你也需要全天不断地用水来“为身体充电”，这样才能保持健康！