公共英语三级阅读文章《浮游生物》

公共英语三级阅读文章《浮游生物》 　　备考下半年的三级要求考生做好阅读的准备。下面，为大家送上一篇公共英语三级阅读文章，欢送阅读。 　　Scattered through the seas of th

公共英语三级阅读文章《浮游生物》 备考下半年的三级要求考生做好阅读的准备。下面，为大家送 上一篇公共英语三级阅读文章，欢送阅读。 Scattered through the seas of the world are billions of tons of small plants and animals called plankton. Most of these plants and animals are too small for the human eye to see. They drift about lazily with the currents, providing a basic food for many larger animals. Plankton has been described as the equivalent of the grasses that grow on the dry land continents, and the parison is an appropriate one. In potential food value, however, plankton far outweighs that of the land grasses. One scientist has estimated that while grasses of the world produce about 49 billion tons of valuable carbohydrates each year, the sea's plankton generates more than twice as much. Despite its enormous food potential, little effect was made until recently to farm plankton as we farm grasses on land. Now marine scientists have at last begun to study this possibility, especially as the sea's resources loom even more important as ameans of feeding an expanding world population. No one yet has seriously suggested that "planktonburgers" may soon bee popular around the world. As apossible farmed supplementary food source, however,