All life on our earth depends, in one way or another, on the sun. 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 our day and our night. Light travels in straight lines. It comes from the sun 45,000,000 miles away. 

    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. Almost 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. This is because the summer day is longer, everything has a longer time to warm up and the sun shines more directly on the earth. In winter, the day is short, there is less time for everything to get warm and the sun doesn't shine more directly on the earth. 

    Land, just like the sand, warms up more quickly than water but it also loses its heat more quickly. So on a hot sunny summer's day on the beach, you can feel how hot the sand gets. The water is cool to the feet when you go for a paddle. 

    The sun makes our earth beautiful. It gives us light. It keeps us warm. It makes things grow. We can not live without the sun. 

    地球上的一切生命都是以各種方式依靠太陽(yáng)而生存的。沒(méi)有太 陽(yáng)的光和熱，就沒(méi)有生命。太陽(yáng)給了我們食物、衣服，甚至我們的煤也是太陽(yáng)供給的。 

    太陽(yáng)還給我們創(chuàng)造了白天和黑夜。光是直線傳播的，它來(lái)自 9500萬(wàn)英里遠(yuǎn)的太陽(yáng)。 

    太陽(yáng)只能照亮半面地球。照亮的一面是白晝，暗的一面就是黑夜。在24小時(shí)當(dāng)中，地球的每部分進(jìn)行著白晝和黑夜的交替。 

    一個(gè)冬天的晴日要比一個(gè)夏天的睛日冷，因?yàn)橄奶斓陌滋毂容^長(zhǎng)，一切東西受熱的時(shí)間較長(zhǎng)，太陽(yáng)直射到地球上。冬天，白晝短，物體受熱時(shí)間相對(duì)短，而且太陽(yáng)相對(duì)較少地直射地球。 

    土地，就像沙子一樣，比水受熱快，但失熱也快。因此，在一個(gè)赤熱的夏日的海灘上你會(huì)感到沙灘多么熾熱，而當(dāng)你在淺水灘行走的時(shí)候，水卻是涼的。 

    太陽(yáng)使我們的地球很美好，它給了我們光亮，使我們溫暖，使萬(wàn)物生長(zhǎng)。沒(méi)有太陽(yáng)，我們就不能生存。