Plants are very important living things. Life could not go on if there were no plants. This is because plants can make food from air， water and sunlight. Animals and man cannot make food from air， water and sunlight. Animals get their food by eating plants and other animals. Man gets his food by eating plants and animals， too. Therefore， animals and man need plants in order to live.

If you look carefully at the plants around you， you will find that there are many types of plants. Some plants are large while others are small. Most plants are green. Plants， like all living things， need air， water and sunlight. Plants do not grow well when they are close together. They need room to spread their roots to get water and to spread their leaves to get sunlight. But air， water and sunlight are not enough. Plants also need a certain amount of warmth. Plants will grow almost anywhere there is plenty of air， water， sunlight and warmth.

植物是非常重要的生物。如果沒有植物，生命将无法维持下去。这是因为植物可以用空气、水和阳光制造养料，而动物和人却不能。动物的食物来源于植物和其他动物，人也是以植物和动物为食的。因此，动物和人需要植物来维持生命。

如果仔细观察周围的植物，你会发现它们种类繁多、大小不一，但它们多数是绿色的。像所有生物一样，植物需要空气、水和阳光。如果植物与植物之间靠得太近，它们会生长得不好。植物需要空间，这样它们的根才能蔓延以摄取水分，它们的枝叶才能伸展以吸收阳光。但是只有空气、水和阳光对植物来说还不够。植物还需要一定的温度。只要有充足的空气、水、阳光和温度，植物几乎可以在任何地方生长。

Vocabulary

therefore adv. 因此

spread v. 伸展

amount n. 数量