2014年职称英语理工类教材学习部分内容及解析
Irish scientists monitoring dolphins living in a river estuary in the southwest of the country believe they may have developed a unique dialect to communicate with each other.
The Shannon Dolphin and Wildlife Foundation 1 has been studying a group of up to 120 bottle-nose dolphins in the River Shannon2 using vocalisations collected on a computer in a cow shed3 near the River Shannon.
As part of a research project, student Ronan Hickey digitised and analysed a total of 1,882 whistles from the Irish dolphins and those4 from the Welsh dolphins on a computer and separated them into six fundamental whistle types and 32 different categories5. Of the categories, he found most6 were used by both sets of dolphins7 -- but eight were only heard from the Irish dolphins.
We are building up a catalogue of the different whistle types they use and trying to associate them with behaviour like foraging, resting, socialising and the communications of groups with calves, project leader Simon Berrow said. Essentially we are building up what is like a dictionary of words they use or sounds they make.
Berrow, a marine biologist, said the dolphins clicks are used to find their way around and locate prey. The whistles are communications. They do a whole range of other sounds like barks, groans and a kind of gunshot, he said. The gunshot is an intense pulse of sound. Sperm whales use it to stun their prey.
When I first heard it I was surprised as I thought sperm whales were the only species who used it. We can speculate the dolphins are using it for the same reason as the sperm whales, Berrow said.
References8 in local legend indicate there have been dolphins in the Shannon estuary for generations and they may even have been resident there as far back as the 6th century9.
They are regularly seen by passengers on the Shannon ferry and an estimated 25,000 tourists every year take special sightseeing tours on local boats to visit them.
词汇:
Irish adj. 爱尔兰的
socialise v. 社交,交往
Dolphin n.海豚
bottle-nose dolphin 宽吻海豚
sperm whale 巨头鲸
click n. 咔哒声,喀嚓声
estuary n. 河口,江口
vocalisation n. 发声
shed n. 小屋,棚
digitalise v. 使数字化
whistle n. 啸声
forage v. 搜寻(食物)
prey n. 被捕食的动物
gunshot n. 射击声
groan n. 呻吟,叹息
pulse n. 脉冲
stun v. 击昏
牛津版小学英语4B全册教案2
外研版英语四下《Unit 2 On Monday I’ll go swimming.》教学设计
外研版英语四下《Module 8 Changes》(unit2)word教案
开心学英语四下《Unit 4 Review 1》word教案(1)
深港版英语四下《Unit 10 Revision》word教案
开心学英语四上《Unit 5 Do you like science》word教案(3)
外研版(一起)第七册Module 4《Unit 2 He invented this bicycle in 1839》word教案(一)
开心学英语四下《Unit 8 Review 2》word教案(2)
北师大版四年级英语上册教案(三年级起始)
2014秋湘少版英语四上《Unit 12 Peter can jump high》教案
先锋英语四年级下教案及教材分析
开心学英语四上《Unit 12 Review 3》(第二课时)word教案
外研版英语四下(一起)全册备课教案设计
外研版英语四下《Module 9 Weekend》(unit1)word学案
开心学英语四上《Unit 12 Review 3》(第一课时)word教案
人教版PEP4 Unit6全单元表格式教案
牛津小学英语4A全册教案[第二套]
外研版英语四下《Module 10 Accidents》(unit1)word教案
开心学英语四下《Unit 4 Review 1》word教案(2)
开心学英语四上《Unit 4 Review 1》word教案
外研版(一起)第七册Module 8《Unit 1 What did she play》word教案
四年级第三单元测试题
人教版小学英语PEP4 Unit1全单元教案(表格式)
外研版英语四下全册备课教案设计
新世纪版英语四下《Unit 7 How Does It Feel》word教案
外研版英语四下《Module 9 Weekend》(unit1)word教案
小学新标准英语四年级上英语教案及拓展资料
牛津版小学英语4B全册教案
外研版英语四下《Module 10 Accidents》word教案
四年级英语下册教案第二部分
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |