light and heat at all, the earth would be very cold and would be all snow and ice.</h3><h3>没有光和热，地球就会很冷，处处都是雪和冰。</h3><h3><br></h3><h3&

gt;then all plants and animals and men would die.</h3><h3>然后一切的植物，动物和人都会去世。</h3><h3><br></h3><h3>we cannot live without light and

heat.</h3><h3>没有光和热咱们就不能生计。</h3><h3><br></h3><h3>yet, if the sun is always shining upon us, we can