新东方背诵文选 L33 Plankton浮游生物.

 Scattered through the seas of the world are billions of tons of small plants and animals called plankton¹. 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 outweighs² that of the land grasses. One scientist has estimated that while grasses of the world produce about 49 billion tons of valuable carbohydrates³ 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 marine⁴ scientists have at last begun to study this possibility, especially as the sea's resources loom⁵ 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 supplementary⁶ 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 maturity⁷, it is not surprising that each one devours⁸ more than one ton of krill daily.

1 plankton   

n.浮游生物

参考例句：

• Plankton is at the bottom of the marine food chain.浮游生物处于海洋食物链的最底层。
• The plankton in the sea feeds many kinds of animals. 海的浮游生物成为很多种动物的食物。

2 outweighs   

v.在重量上超过( outweigh的第三人称单数 )；在重要性或价值方面超过

参考例句：

• Her need to save money outweighs her desire to spend it on fun. 她省钱的需要比她花钱娱乐的愿望更重要。 来自《简明英汉词典》
• Its clarity in algebraic and analytical operations far outweighs any drawbacks. 文化代数和解析运算中的清晰性远远胜过任何缺点。 来自辞典例句

3 carbohydrates   

n.碳水化合物，糖类( carbohydrate的名词复数 )；淀粉质或糖类食物

参考例句：

• The plant uses the carbohydrates to make cellulose. 植物用碳水化合物制造纤维素。 来自《简明英汉词典》
• All carbohydrates originate from plants. 所有的碳水化合物均来自植物。 来自辞典例句

4 marine   

adj.海的；海生的；航海的；海事的；n.水兵

参考例句：

• Marine creatures are those which live in the sea. 海洋生物是生存在海里的生物。
• When the war broke out,he volunteered for the Marine Corps.战争爆发时，他自愿参加了海军陆战队。

5 loom   

n.织布机，织机；v.隐现，(危险、忧虑等)迫近

参考例句：

• The old woman was weaving on her loom.那位老太太正在织布机上织布。
• The shuttle flies back and forth on the loom.织布机上梭子来回飞动。

6 supplementary   

adj.补充的，附加的

参考例句：

• There is a supplementary water supply in case the rain supply fails.万一主水源断了，我们另外有供水的地方。
• A supplementary volume has been published containing the index.附有索引的增补卷已经出版。

7 maturity   

n.成熟；完成；(支票、债券等)到期

参考例句：

• These plants ought to reach maturity after five years.这些植物五年后就该长成了。
• This is the period at which the body attains maturity.这是身体发育成熟的时期。

8 devours   

吞没( devour的第三人称单数 )； 耗尽； 津津有味地看； 狼吞虎咽地吃光

参考例句：

• If anyone tries to harm them, fire comes from their mouths and devours their enemies. 若有人想要害他们，就有火从他们口中出来，烧灭仇敌。
• It eats away parts of his skin; death's firstborn devours his limbs. 他本身的肢体要被吞吃，死亡的长子要吞吃他的肢体。