【英语时差8，16】天生爱游荡
时间：2019-03-06 作者：英语课 分类：英语时差8，16
英语课
When you've been to the zoo have you noticed how some of the animals pace around a lot? In this Moment of Science Don and Ya?l discuss one explanation for this behavior. D: Ya?l, I went to the zoo yesterday, and boy, the polar bear just kept pacing in circles, and don't even get me started about the lions. I guess they must really miss hunting, huh?
Y: You know, Don, that's what scientists used to think too, and so zoos worked hard to compensate 1 for this by focusing on stimulating 2 hunting behavior. But now scientists think the problem might be that the animals miss the freedom to roam.
D: That makes sense. After all, a polar bear's natural range is about the size of South Carolina.
Y: Right--and the typical zoo habitat is about one millionth of that.
D: No wonder some animals spend about a quarter of their time pacing. But how did scientists figure out that this was the problem?
Y: Well, researchers at Oxford 3 studied the pacing behavior of thirty-five captive species using data from the over one thousand scientific articles published since the 1960s. And when they analyzed 4 this data--which represented more than five hundred zoos worldwide--they determined 5 that the deciding factor for pacing was range size. That also explains why stay-close-to-home species like snow leopards 6 tend to thrive in zoos.
D: So what happens now?
Y: Well, one option is for zoos to build larger, more varied 7 habitats, and switch enclosures periodically to simulate roaming. But a better option might be to phase animals like polar bears out of zoos, and focus instead on those animals that do well in captivity 8. The problem is that this is a double-edged sword: these animals' natural habitats are increasingly threatened as well.
D: Depressing.
Y: No kidding.
vt.补偿，赔偿；酬报 vi.弥补；补偿；抵消
- She used her good looks to compensate her lack of intelligence. 她利用她漂亮的外表来弥补智力的不足。
- Nothing can compensate for the loss of one's health. 一个人失去了键康是不可弥补的。
adj.有启发性的，能激发人思考的
- shower gel containing plant extracts that have a stimulating effect on the skin 含有对皮肤有益的植物精华的沐浴凝胶
- This is a drug for stimulating nerves. 这是一种兴奋剂。
n.牛津（英国城市）
- At present he has become a Professor of Chemistry at Oxford.他现在已是牛津大学的化学教授了。
- This is where the road to Oxford joins the road to London.这是去牛津的路与去伦敦的路的汇合处。
v.分析( analyze的过去式和过去分词 )；分解；解释；对…进行心理分析
- The doctors analyzed the blood sample for anemia. 医生们分析了贫血的血样。 来自《简明英汉词典》
- The young man did not analyze the process of his captivation and enrapturement, for love to him was a mystery and could not be analyzed. 这年轻人没有分析自己蛊惑著迷的过程，因为对他来说，爱是个不可分析的迷。 来自《简明英汉词典》
adj.坚定的；有决心的
- I have determined on going to Tibet after graduation.我已决定毕业后去西藏。
- He determined to view the rooms behind the office.他决定查看一下办公室后面的房间。
n.豹( leopard的名词复数 )；本性难移
- Lions, tigers and leopards are all cats. 狮、虎和豹都是猫科动物。 来自《简明英汉词典》
- For example, airlines never ship leopards and canaries on the same flight. 例如，飞机上从来不会同时运送豹和金丝雀。 来自英语晨读30分（初三）
adj.多样的，多变化的
- The forms of art are many and varied.艺术的形式是多种多样的。
- The hotel has a varied programme of nightly entertainment.宾馆有各种晚间娱乐活动。