All life on our earth depends on① the sun in one way or another. Without its light and warmth， there would be no life. The sun gives us our food and our clothing material. It even gives us our coal， too.
The sun also makes day and night. Light which comes from the sun 95，000 miles away travels in straight lines.
The sun lights half the earth at a time. It is day on the lighted side. It is night on the dark side of the earth. Every part of the earth turns from day to night during every 24 hours.
A sunny day in winter is colder than a sunny day in summer. Because the summer day is longer， so it takes a longer time for everything to warm up and the sun shines more directly on the earth. Oppositely， the day is shorter in winter， there is less time for everything to get warm and the sun does not shine more directly on the earth.
Land， just like the sand， warms up and loses heat more quickly than water. So on a hot sunny summer day on the beach②， you can feel how hot the sand gets. And when you go for a paddle③， you can feel how cool the water is to the feet.
The sun makes our earth beautiful. It gives us light and keeps us warm. It makes things grow. In a word， we can not live without the sun.
① depend on依靠，依赖
② beachn. 海滩，江滨
③ paddlen. (短而阔的)桨
太阳
一切在地球上的生命都以各种方式依靠太阳而生存。没有太阳的光和热，也就谈不上有生命。太阳供我们以食物、衣服，就连煤也是其供给的。
太阳创造白天和黑夜。光是来自9，500万英里远的太阳，按直线传播。
太阳只能照亮半面地球。照亮的一面是白昼，暗的一面就是黑夜。在24小时当中，地球的每部分进行着白昼和黑夜的交替。
冬天的晴日要比夏天的睛日冷，因为夏天的白天比较长，相对应地，一切东西受热的时间也较长，太阳有时也会直射到地球上。冬天则相反，白昼时间短，物体受热时间也短，而且太阳直射地球的时间也相对地较少。
就像沙子一样，土地比水受热快，但失热也快。所以，在赤热夏日的海滩上你会感到沙滩的炽热，而当你在浅水滩行走的时候，就会感觉到水的凉爽。
我们的地球因为有了太阳而应得很美好，因为太阳给了我们光亮，使我们温暖，使万物生长。总之一句话，没有太阳，我们就不能生存。