VOA慢速讲解附字幕:全球水产养殖蓬勃发展

蔓延

Fish Farms May Soon Supply More Than Half the World's Catch
This is the VOA Special English Agriculture Report.
Traditional fisheries may no longer be the world’s most important provider of fish. A new United Nations report shows that fish farming or aquaculture may soon lead fish production.
The Food and Agriculture Organization says aquaculture is growing by a rate of 6.6 percent a year.
Aquaculture now produces forty-six percent of the world’s supply of fish. Thatrepresents a forty-three percent increase from two thousand six. The report also said aquaculture earned more money in two thousand eight than traditional fisheries.
The FAO headquarters in Rome published the document, "State of the World’s Fisheries and Aquaculture."
In aquaculture, fish are raised in tanks or small bodies of water called ponds. They also are raised in cages or nets in oceans, lakes and rivers.
The report says increased aquaculture has helped people around the world eat record amounts of fish. The FAO says each person ate an average of almost seventeen kilograms of fish last year.
But the FAO says the current yearly wild-fish harvest of ninety million tons shows no improvement. Decreasing numbers of fish and stronger catch limits have reduced the possibilities for catching wild fish.
The FAO report says about thirty-two percent of world supplies are overfished,depleted or recovering. It said these supplies of fish need to be urgently rebuilt.
Some scientists have criticized aquaculture. They say the nets and cages permit fish diseases and pests to spread.
Some aquaculture critics doubt that aquaculture can keep growing at the current rate. But Wally Stevens of the trade group Global Aquaculture Alliance says the industry must continue developing to feed growing populations.
Mr. Stevens says a one hundred percent increase in fish farming over ten years is necessary to keep providing for people at the current level. He notes that aquaculture creates jobs and wealth, especially for people in coastal areas of China.
The FAO reports that China remains the world’s largest fish-producing nation. China produces more than sixty percent of the world’s farmed fish.
And that’s the VOA Special English Agriculture Report, written by Jerilyn Watson. Our programs are online with transcripts and MP3 files at voaspecialenglish.com. You can also find us on Facebook and Twitter at VOA Learning English. I’m Bob Doughty.

这里是VOA特别英语农业报道。
传统的渔场可能已经不再是全世界最重要的鱼类供应者。联合国一份新的报告显示，水产养殖可能很快就会在渔业生产领域处于领先地位。
粮农组织(The Food and Agriculture Organization，FAO)表示，水产养殖正以每年6.6%的速度增长。
水产养殖现在供应着全球46%的鱼类，比2006年增加了43%。该报告还表示，2008年，水产养殖的收入已经超过传统渔场。
粮农组织驻罗马总部发表了题为“全球渔业和水产养殖现状”的报告。
在水产养殖中，鱼类在水槽或小型池塘中养殖。还可以在海洋，湖泊和河流的网箱中养殖。
该报告指出，水产养殖的发展使得全世界的人们食用鱼的数量达到创纪录的高度。FAO表示，去年，每人平均食用了接近17千克鱼。
但是FAO表示，目前野生鱼类捕获量1900万吨的数量没有上涨。不断减少的鱼类数量和更加严格的捕捞限制降低了捕获野生鱼类的可能性。
FAO这份报告称，全世界32%的鱼类资源过度捕捞，耗尽或者正在恢复。该报告表示，这些鱼类资源亟需重建。
一些科学家对水产养殖提出批评。他们表示，网箱容易导致疾病滋生，昆虫蔓延。
一些水产养殖批评家怀疑水产养殖能否保持现在的增长速度。但是贸易组织全球水产养殖联盟(The Global Aquaculture Alliance, GAA)的
Wally Stevens表示，必须继续发展水产养殖行业，以供养不断增长的人口。
Stevens表示，水产养殖必须在十年之内增长100%才能以目前的水平供应人口需求。他指出，水产养殖可以为人们创造就业岗位和财富，尤其是中国沿海地区的居民。
FAO表示，中国仍然是全世界最大的鱼类生产国。全世界超过60%的水产养殖鱼类来自中国。
词汇学习：

1.aquaculture n.水产业
2.represent v.代表, 象征, 表示
例句：The pilots respectfully represented that they were not at all tired.
      飞行员郑重表示他们一点也不累。
      He represented himself to be the Son of God.
      他自称是救世主。
3.headquarter n.总部
4.raise v.抚养; 饲养
例句：The old man likes raising rabbits, chickens, dogs and horses.
      这个老人喜欢养兔子、鸡、狗和马。
      They raised five thousand chrysanthemums last year.
      去年他们种了五千株菊花。
5.yearly adj.每年的, 一年一度的
例句：The flower show is a yearly event in our town.
      我们镇上的花展一年举行一次。
      The earth makes a yearly revolution around the sun.
      地球每年绕太阳一周。
6.harvest n.收成, 收获量
例句：There was a good harvest that year.
      那一年收成好。
7.improvement n.增加或修改
例句：There is room for further improvement in English.
      你的英语尚有进一步提高的余地。
改进, 改善, 改良
例句：Your work shows considerable improvement.
      你的工作显示出相当大的改进。
8.deplete vt.〈正〉使大大的减少; 使空虚
例句：Our supplies of food are rather depleted.
      我们的食品供应大大地减少了。
内容解析：

1.Traditional fisheries may no longer be the world’s most important provider of fish.
no longer不再, 已不, 不复, 再也不
例句：He was long a famous musician, but he plays no longer.
      他成为有名的音乐家已很久了, 但他现在不演奏了。
      The city's water supply is no longer adequate for its need.
      这个城市的供水已不敷需求。
2.The FAO says each person ate an average of almost seventeen kilograms of fish last year.
an average of平均有(跟数词)
例句：An average of ten students are absent each day .
      每天平均有10个学生缺课。
average用作名词，注意以下用法：
(1) 表示“平均”、“平均数”，是可数名词。如：
The average of 6，8 and 10 is 8. 6，8，10的平均数是8。
An average of 10 students are absent each day. 平均每天有10个学生缺席。
It’s said thatthe paper receive an average of nearly 100 articles a day. 据说这个报社平均每天要收到百来篇来稿。
(2) 表示“普通”、“标准”、“平常”等（大致相当于“一般水平”的意思)，根据情况可用作可数或不可数名词。如：
Tom’s work atschool is above (the) average, Jim’s is below (the) averageand Jack’s is up to (the) average. 汤姆的学习成绩属于中上水平，吉姆的学习成绩属中下水平，杰克的学习成绩属中等水平。
(3) 表示“平均起来”、“在一般情况下”，可用 on average, onan (the) average。如：
On (the) average we receive ten letters eachday. 我们平均每天收到10封信。
He smokes 20 cigarettes a dayon an average. 他平均每天要抽20支烟。
3.Some aquaculture critics doubt that aquaculture can keep growing at the current rate.
keep doing的用法
含keep的常用句型
keep doing sth. 意为"继续干某事"，表示不间断地持续干某事，keep后不能接不定式或表示静止状态的v-ing形式，而必须接延续性的动词。如：
He kept working all day, because he wanted to finish the work on time.他整天都在不停地工作，因为他想准时完成工作。
Keep passing the ball to each other, and you'll be OK.坚持互相传球，你们就行。
keep on doing sth. 意为"持续做某事"。如：
The pupil kept on asking me the same question.这个学生不断地问我同一个问题。
I kept on thinking about the match in the afternoon.我总是想起下午的那场比赛。
keep...from doing sth.意为"阻止/防止……做某事"。如：
The heavy snow kept us from going out.大雪使我们不能出去。
4.China produces more than sixty percent of the world’s farmed fish.
more than超过,多于
例句：It's no more than one mile to the shops.
      到商业区不过一英里。
      His insolence is more than I can stand.
      我受不了他的无礼。

oscar

一看到前面一大堆英文，头都晕~