About 70% of the Earth’s surface is covered by water.
地球表面的 70% 被水覆盖。
Most of this water is in the oceans.
其中大部分是海洋里的水。
Oceans are very large bodies of saltwater.
海洋是巨大的咸水区域。
Besides oceans, there are lakes, rivers, and glaciers.
除了海洋，还有湖泊、河流和冰川。
Lakes and rivers hold freshwater that people and animals can drink.
湖泊和河流储存着淡水，人类和动物可以饮用。
Glaciers are frozen water found in very cold places.
冰川是存在于极寒地区的冰冻水。
Water is essential for all living things.
水对所有生命来说都是必不可少的。
Humans, animals, and plants need water to survive.
人类、动物和植物都需要水才能生存。
People use water for drinking, cooking, and cleaning.
人们用水来喝、做饭和清洁。
Farmers need water to grow crops.
农民需要水来种植庄稼。
Fish and other water animals live in lakes, rivers, and oceans.
鱼类和其他水生动物生活在湖泊、河流和海洋中。
The water cycle moves water around the Earth.
水循环让水在地球上不断流动。
Water evaporates from oceans and turns into clouds.
水从海洋蒸发，变成云。
Then, it falls as rain or snow, filling rivers and lakes again.
然后，它以雨水或雪的形式落下，重新填满河流和湖泊。
Clean water is very important, but pollution can make water unsafe.
干净的水非常重要，但污染会使水变得不安全。
People should protect water sources and not waste water.
人们应该保护水源，不能浪费水。
If we use water wisely, there will be enough for everyone.
如果我们合理用水，就能保证每个人都有足够的水。
Earth’s water is precious, and we must take care of it.
地球上的水资源非常珍贵，我们必须珍惜它。
Now you know that most of the Earth’s surface is covered with water, and it is vital for life!
现在你知道地球表面大部分是水，而水对生命至关重要了！
