We live in the earth, there is water around the surface of the earth, we can't live without water. We drink water everyday, even in the food, it is said that there is a lot of water in it, even though we can't see. People will die if they don't drink water in the long term. Water is so important, we need to protect it from pollution.
我们住在地球上，地球表面有很多水，我们不能离开水而活着。我们每天都喝水，即使在食物里，据说有很多水分在里面，虽然我们看不到。人们如果在长时间内不喝水的话就会死。水很重要，我们需要保护水不受污染。