声纳的使用以保护海洋哺乳动物。虽然海军得以继续在南加利福尼亚海岸训练，但环境学家们还是赢得了部分胜利，因为这条规定并未给予海军方面全部自由，他们必须准备一份未来训练对环境影响的报告。
2. 然而，人们广泛担忧市民可能会成为猛犬的下一个攻击对象，这种担忧将人类昔日的好友推到了政府工作计划名单上的第一位。 3. 那些对肌肉强劲，下颌粗壮的猛犬着迷的人会通过猛犬杂交的方式规避法律，比如马士提夫獒犬和斗牛犬的―狗杂种‖就是完全合法的。实际上，英国已经有人这么做了。
4. 他指出：―其他（杂种）狗要么是两条狗在郊区草丛繁茂处欢乐一场后的结晶，要么是那些（爱凶猛大）狗的混蛋们故意让狗杂交配种后的产物。
5. 丹麦每年约有四万只杂种狗出生，这样大规模地―打狗‖是令人担忧的。
III． Comprehension of the Texts
1. This Proposition has both advocates and opponents. The opponents argued that this proposition will increase the cost of egg producers of California state so that their eggs will be less competitive in price than those of other states. The advocates disagree because a study indicates that the little price increase in California eggs will be acceptable by the majority of California customers.
2. It means the farmers out of the state of California.
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3. No. Because his daughter Malia is allergic to sort of dogs. 4. President Obama.
5. Because the report petted the dog when it was not in a good mood. 6. The sonar pulses damage the hearing organs of whales and dolphins and can also hinder their ability to mate, find food and navigate. Some sonar pulses appear to have caused whales to strand themselves on shore, with necropsies finding signs of internal bleeding near their ears.
7. No. Because the virus is latent in elephants in the wild as well as in captivity. 8. F
9. Their main defense is basically hanging around, looking like a twig 10. Grooming service, i.e. nit-picking. 11. Macaque; simians
12. They set up a live satellite feed. 13. Once in two weeks.
14. Mr Moller claims this is the only way to eliminate aggressive traits from the doggy gene pool.
15. Indignant comments about Nazis and racial cleansing have swamped online forums.
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UNIT 4 Food I． Vocabulary Builder 1. Definition
1) wreak havoc: do serious harm to; cause damage or problem 2) presume: assume; suppose; to be sure of sth. but without proof 3) originate: come from; develop from 4) indication: sign; suggestion; hint; proof
5) waded through: read sth that is long or difficult to read, without interest or enjoyment
6) output: quantity of production; yields 7) embrace: eagerly accept
8) excess: a larger amount of something than is allowed or needed 9) dissect: to cut up the body of a dead animal or person in order to study it
10) grapple with: to try hard to deal with or understand something difficult 2. Blank filling
1) exposure 2) retain erupted 6) yield advocate
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3) presumed 4)
5) gross 7) unfold
8) adaptation 9) definitive
10)
II． Sentence Translation
1. 一些人宣称对很多食物过敏，而他们列出的过敏食物清单之长让人不禁怀疑，这是那些对吃过分挑剔的人在为自己对食物的爱憎找个合理依据。
2. 然而，当我旁观这场有机食品防御战慢慢展开，我体会到了一种令人不快的似曾相识之感。如果过去发生的事情预示着现在，那么我们这些一直追踪有机食品论战的人现在就已注定了要在将来苦读成堆的研究资料，研究有机食品和传统食品哪种对健康更有利。
3. 当有机农业的捍卫者们开始拿出研究成果试图证明，如一个有机番茄的黄酮类化合物比传统番茄高出97%，那么他们已经陷入了致命的误区。
4. 科学背后的数据可能是可靠的，但是这种科学沦落到以数据比较判断质量，这完全是有机运动的创始人们所鄙视的。
5. 真正重要的是，有机食品能做到其他食品生产工业所无法做到的：有机工业运作的前提是大自然有一套自己的经济体系，该体系超越了事实和数字，将大自然的地位放在短期利益之上，其运作机制所基于的逻辑原理是无法量化的。 III． Comprehension of the Texts
1. People who are lactose intolerant can't digest the main sugar —lactose— found in milk. In normal humans, the enzyme that does so —lactase— stops being produced when the person is between two
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and five years old.
2. Sweden has one of the world’s higest percentages of lactase tolerant people.
3. We shouldn't really call lactose intolerance a disease, because that presumes it's abnormal. Instead, they call it ―lactase persistence‖, indicating what's really weird is the ability to continue to drink milk. 4. The mutation showed up first in Northern Europe, where people got less vitamin D from the sun and therefore did better if they could also get the crucial hormone (it's not really a vitamin at all) from milk. 5. The theory shows that the mutation actually appeared about 7,500 years ago in dairy farmers who lived in a region between the central Balkans and central Europe.
6. The European mutation is different from several lactase persistence genes associated with small populations of African peoples. And they found three other mutations.
7. Because the advocates think the PSA didn’t take many important factors into account. For example, the impact of synthetic fertilizer and insecticides; and the connection between the latter and Parkinson’s Disease.
8. The first debate is about the yields/output of the organic food, with advocates arguing that organic can feed the world while detractors insist it would cause mass starvation. The second debate is about the
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