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，生命將無法維持下去。這是因為植物可以用空氣、水和陽光制造養(yǎng)料，而動物和人卻不能。動物的食物來源于植物和其他動物，人也是以植物和動物為食的。因此，動物和人需要植物來維持生命。

如果仔細觀察周圍的植物，你會發(fā)現(xiàn)它們種類繁多、大小不一，但它們多數(shù)是綠色的。像所有生物一樣，植物需要空氣、水和陽光。如果植物與植物之間靠得太近，它們會生長得不好。植物需要空間，這樣它們的根才能蔓延以攝取水分，它們的枝葉才能伸展以吸收陽光。但是只有空氣、水和陽光對植物來說還不夠。植物還需要一定的溫度。只要有充足的空氣、水、陽光和溫度，植物幾乎可以在任何地方生長。

Vocabulary

therefore adv. 因此

spread v. 伸展

amount n. 數(shù)量