编辑点评: 研习GRE作文考试的优秀范文不仅可以学到有用的词汇和句子,更能从中学习逻辑的构建方式和作文框架的结构等内容,这里为大家提供GRE的范文,希望对同学们的备考有所帮助。
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 comparison 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 a means of feeding an expanding world population.
No one yet has seriously suggested that plankton-burgers may soon become popular around the world. As a possible farmed supplementary food source, however, plankton is gaining considerable interest among marine scientists.
One type of plankton that seems to have great harvest possibilities is a tiny shrimp-like creature called krill. Growing to two or three inches long, krill provides the major food for the great blue whale, the largest animal to ever inhabit the Earth. Realizing that this whale may grow to 100 feet and weigh 150 tons at maturity, it is not surprising that each one.
体坛英语资讯:Ronaldo thanks fans after hospital release
体坛英语资讯:Hu Mingxuans decisive three helps China Team Blue beat Finland 87-84 in overtime
国际英语资讯:Thailand starts construction of monorail transit lines in Bangkok
Is it Good to Study Abroad in a Young Age? 年幼留学好不好?
Making Friends Online 关于网上交友
On Changing Major Halfway 关于中途换专业
那些让你快乐的小错误
上班族每年盯着电脑的平均时间为1700小时
国际英语资讯:Pompeo speaks with S. Korean, Japanese FMs over phone on next step on DPRK engagement
体坛英语资讯:Kenyans Kirui, Karoki relish Chicago marathon challenge in battle against Farah
每天睡多几个小时才最健康?
调查显示 国内超七成大学生目前是单身
这些人坦白了出轨的真正原因
做一个对被人有价值的人
国际英语资讯:Trump announces trade agreement with Mexico on NAFTA overhaul
体坛英语资讯:Fit Namibia ready for fast-paced Kenya in final round of Rugby Gold Cup match
调查显示 国人需储蓄182万元养老
国内英语资讯:Chinese lawmakers weigh new law on soil pollution
Would You Like To Study Alone? 你喜欢独自学习吗?
体坛英语资讯:Messi to miss Argentina friendlies - reports
国际英语资讯:Feature: Kofi Annan remembered in Ghana and beyond
女性一生中花在护肤品上的开销高达8000英镑
Self-discipline 自律
国内英语资讯:Premier Li stresses persistent efforts in medical reforms
国内英语资讯:China Focus: China moves on phase II of drafting civil code
国内英语资讯:Lawmakers mull regulation to protect memorial ceremony for Nanjing Massacre victims
福布斯选出世界最赚钱女演员!竞争可真激烈啊
这些食物会让你不舒服
国内英语资讯:FOCAC effective to boost China-Africa cooperation: envoy
大数据揭秘我国城镇居民的夜生活
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |