Page 1
In spring and summer, many leaves look green and full of life.
在春天和夏天，很多树叶都会显得绿油油的，很有生气。正文预览
Page 2
Leaves look green mainly because they contain chlorophyll, a substance that helps plants use sunlight to make food.
树叶之所以是绿色，主要因为里面有叶绿素，它能帮助植物利用阳光制造养分。
Page 3
When autumn brings shorter days and cooler temperatures, trees begin preparing for winter, and that change affects the leaves too.
当秋天带来更短的白天和更低的气温时，树木就会开始为冬天做准备，而这种变化也会慢慢影响到叶子。
Page 4
As the tree prepares for colder months, it stops making as much chlorophyll in many leaves.
当树木开始为寒冷季节做准备时，很多叶子里制造叶绿素的速度就会慢下来。
Page 5
When the green fades, other colors that were hidden in the leaf can become easier to see.
当绿色慢慢退去时，叶子里原本被遮住的其他颜色就会更明显地显现出来。
