时间:2018-12-08 作者:英语课 分类:背诵为王第四册


英语课

Lesson51 Dolphins

Some people think that dolphins have a real language and that if we couldlearn their language; we could eventually start talking to them anddiscussing the important news of the day.

Sadly, this is only a dream. They may have very big brains and they may makelots of strange noises, but they do not, if we are honest about it, have atrue language. It is nice to think they do, but it is simply not thecase.They do, however, have a very special talent for using their noises tofind their way about the oceans and to locate shoals of fish. This is a kindof sonar - an echo-location system. What happens is that the dolphin swimsalong, chirping 2 and squeaking 4, and these very high-pitched sounds spreadthrough the water until they hit some solid object. Then the sound-wavesbounce back to the dolphin. The animal can tell how far away the object isby checking how long it takes for the sound to reach him. This feature ofsound detection is copied by human beings onto some devices used insubmarines, helping 5 them to locate objects and avoid collisions.

With all its special qualities, it is easy to see why we find the dolphin soattractive. It has graceful 6 movement, it is intelligent, it is helpful tothose in trouble, it has a playful character and it has a face that alwayslooks happy.

These are all qualities we admire in human beings, so it is not surprisingthat we are so fond of the dolphin.


shoal 鱼群

chirp 1 吱喳而鸣

squeak 3 发吱吱声


海豚

有些人认为海豚有真正的语言,如果能学会它们的语言,我们就能最终和它们交谈,谈论当今重要的新闻。可惜的是,这只是一个梦想。海豚拥有很大的大脑,能够发出许多奇怪的声音,但是老实讲,它们并不拥有真正的语言。能这样认为固然不错,但这不是事实。

然而,海豚确实有特殊的才能,可以利用它们发出的声音在大海里探路和确定鱼群的位置。这是一种声纳装置,一种回声定位系统。具体来讲,海豚边游动边发出嘁嘁喳喳的声音,这些音调很高的声音在水里传播,碰上坚硬的物体后,声波就返回到了海豚。通过声音返回所需的时间,海豚就能确定物体有多远。人类模仿海豚这种声音探测的特征发明了一些潜水艇用的定位和避免碰撞的装置。

海豚具有如此多独特的品质,那就不难理解它为什么那么惹人喜爱了。它动作优雅,聪明伶俐,乐于帮助处于危难之中的人,它生性好玩,还有一张看上去总是很快乐的脸。

这些都是我们人类崇尚的品质,所以我们如此喜欢海豚就一点也不奇怪了。



1 chirp
v.(尤指鸟)唧唧喳喳的叫
  • The birds chirp merrily at the top of tree.鸟儿在枝头欢快地啾啾鸣唱。
  • The sparrows chirp outside the window every morning.麻雀每天清晨在窗外嘁嘁喳喳地叫。
2 chirping
鸟叫,虫鸣( chirp的现在分词 )
  • The birds,chirping relentlessly,woke us up at daybreak. 破晓时鸟儿不断吱吱地叫,把我们吵醒了。
  • The birds are chirping merrily. 鸟儿在欢快地鸣叫着。
3 squeak
n.吱吱声,逃脱;v.(发出)吱吱叫,侥幸通过;(俚)告密
  • I don't want to hear another squeak out of you!我不想再听到你出声!
  • We won the game,but it was a narrow squeak.我们打赢了这场球赛,不过是侥幸取胜。
4 squeaking
v.短促地尖叫( squeak的现在分词 );吱吱叫;告密;充当告密者
  • Squeaking floorboards should be screwed down. 踏上去咯咯作响的地板应用螺钉钉住。 来自《简明英汉词典》
  • Can you hear the mice squeaking? 你听到老鼠吱吱叫吗? 来自《简明英汉词典》
5 helping
n.食物的一份&adj.帮助人的,辅助的
  • The poor children regularly pony up for a second helping of my hamburger. 那些可怜的孩子们总是要求我把我的汉堡包再给他们一份。
  • By doing this, they may at times be helping to restore competition. 这样一来, 他在某些时候,有助于竞争的加强。
6 graceful
adj.优美的,优雅的;得体的
  • His movements on the parallel bars were very graceful.他的双杠动作可帅了!
  • The ballet dancer is so graceful.芭蕾舞演员的姿态是如此的优美。
学英语单词
a carreira
acid attack
air-glass reflection
aldosterone deficiency
amaxophobia
amount carried over
asynchronous logic
automatic meter reading system
bankrupt
barter agreement
battery ore
be weak on
bishopess
burnishing surface
caryophyllenol
CHBHA
civil-war
CM8222
Cobury bread
cognitive limits
coitus int.erruptus
common platform
decimal scale
diphosphorus
disintegration chain
displacement ferroelectrics
drum polletizing
dtb
ectopia lentis
eissero
enter into conversation with
F.I.A.S.
fecundly
fixed sash
fizzlings
freelore
fuster
gelisolifluction
ground-basses
Harrison 2, Benjamin
hole reaming
hop residue
Hornstorf
Hydrangea shaochingii
in-statest
indirect-measurement
inner reflector
interleukine
intra-atomic energy
Irish Republic
Jaggarnat
lactosylceramides
laminae spiralis secundaria
Lexus lane
Lindera limprichtii
lineo-normal distribution
Macht metal
mendication
mizuage
monodactyl
Morellin
multilepis
narcisms
nasal splint
Nemipterus
noelani
noiseuses
non-stimulated
not busy interrupt
oil pressure unit
Opie paradox
orthomitosis
pack-up kits
perspective projection
preheating process
quarternary alloy
radio resource control
refreshable
rockfill breakwater
scavenge trunk
set much by someone
shared main storage
sheafer
single loop servomechanism
Soranus
stylistic component
Syväri
Szarvas
tectomorphic texture
tettigoniid
thiodan
Thymus nervulosus
totalizing
toxicological detection
transport mean-free path
unflappability
unven
vibrating-reed amplifier
vinous tincture
Västernorrlands Län
well-behaved net
wood spurge