无论是小草,还是参天大树,只要是植物就能合成人类和其他生物所必需的碳水化合物。这是因为植物的绿色部分含有一种叫做叶绿体的有色物质,它能吸收阳光的能量,把二氧化碳和水等无机物转化为有机物,并且释放氧气。植物的叶绿体吸收太阳的能量,将二氧化碳和水转化为碳水化合物(有机物)的这一过程就叫光合作用,其中的秘密已被科学家揭开。 Whether grass or towering trees, any plant can synthesize carbohydrates necessary for humans and other living things. This is because the green part of the plant contains a colored material called the chloroplast, which absorbs the energy of sunlight, converts inorganic substances such as carbon dioxide and water into organic matter, and releases oxygen. The process by which plants’ chloroplasts absorb the energy of the sun and convert carbon dioxide and water into carbohydrates (organic matter) is called photosynthesis, and the secret has been uncovered by scientists.