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████    重点词汇
████    难点词汇
████    生僻词
████    词组 & 惯用语

[学习本文需要基础词汇量:4,000 ]
[本次分析采用基础词汇量:5,000 ]

and when you actually get
underwater they have

an incredibly complex and
dynamic social life

And they're very curious,
and very cool to be with

Terri discovered that young
male seals seem to learn

an extraordinary courtship song
by closely mimicking older males

Whoah eeee...ell, l know it sounds
much more intense than that but,

l'm a female

These vocalisations kind of allow
males to kind of feel each other out

and figure out who are the males
to stay away from

and who they can potentially
be harmed by,

They're bigger and more
dominant than other males

that they actually can overcome

The biggest lesson that
l've learned is that

if you want to look at harbour
seals and understand their behaviour

you have to look at them underwater

Almost everything interesting
these animals do occurs underwater

Hundreds of miles to the north,
off Prince William Sound, Alaska,

another Blue Planet team came in
search of one of the least known sharks

in the world - salmon sharks

These unusual relatives of
the Great White Shark

have never been observed
behaving naturally underwater

and we were keen to try
and get unique

images using a remote camera
attached to a pole

Director, Hugh Pearson, could watch
the action with a monitor on the surface

lt was great to try and come out
and film something very new,

and also it just fitted in
so well with our story

because the whole theme of
the temperate programme

is the seasonality of the seas,
and this story is totally seasonal

You know, the salmon sharks are
waiting for the salmon

to move in to spawn
and then they move in

Obviously with these sharks we've
hoping that we're going to get them

actually behaving naturally
and sort of fishing

amongst the salmon in the
thick numbers that we've told

The timing for us to come here for
the salmon sharks is just absolutely vital

because for most of the year
the scientists think that

they're out feeding away in the
North Pacific on whatever's out there,

but they follow the salmon in and
the salmon only run in for a few weeks

or maybe a month
or so during the summer

lt's not just the sharks
that are after the salmon

There's a big fishing industry here
and we were advised by marine biologist,

Ken Goldman, who works with the fishermen
who help him catch sharks for science

Salmon sharks are becoming an important
resource for the state of Alaska,

There's become a large interest
in sport fishing for them,

it's kind of becoming big news
for game fishing

and the state and federal
government are very interested

in managing this shark species
before the population

begins to decline because
of the fishery

Catching and tagging
a 4 metre shark is hard work,

but Ken hopes it might
provide vital information

about population size
and where the sharks go to breed

They have only ever been
seen here off Alaska

and then for just one
month each year

The rest of their lives
remains a mystery

Alright. Yeah that'll be fine,
looks good

This is often the only close-up look
that Ken ever gets of his shark

and he was as fascinated as we were
to see what pictures would emerge

from our patient work with
the camera on a pole

This is a selection of like,

about three minutes of some
of the good stuff we got

This kind of activity is what
l don't get to see

Even when l look over the side
of the boat l'm getting a top view

and what l don't get is
the side of the animal

looking up underneath it,
those views

What's the distance from the camera?
That's nice

That there, when he's out there,

that's probably 1 0 foot is
when you start to see them

They're probably seeing that
camera at 30 feet or who knows

but they're certainly adapted to that
environment where ours is not and so...

Do you think from that that
they're very visual predators?

Yeah

By exploiting the sharks'
acute visual sense,

we hoped to lure them closer to
get some more powerful images still

lf you get that silver-sided salmon doing
what you're doing either in the boat,

moving it along you know
you've got something visual

that's going through the water

You can't really see it when
you're not getting a video shot

like this where that fish comes in,
it turns its head to it

and then turns away, it's that curious
and cautious and curious

and cautious and then
comfortable enough to go for it

lt's a new look, it's, this is a shark
that so little is known about

and very few people have had the
opportunity to see them underwater,


知识点

重点词汇
biologist [baɪˈɒlədʒɪst] n. 生物学家 {toefl :5075}

cautious [ˈkɔ:ʃəs] adj. 谨慎的;十分小心的 {gk cet4 cet6 ky toefl ielts :5231}

lure [lʊə(r)] n. 诱惑;饵;诱惑物 vt. 诱惑;引诱 n. (Lure)人名;(英)卢尔 {ky toefl ielts gre :5288}

underneath [ˌʌndəˈni:θ] prep. 在…的下面;在…的形式下;在…的支配下 n. 下面;底部 adj. 下面的;底层的 adv. 在下面;在底下 {cet4 cet6 ky toefl ielts :5554}

fascinated [ˈfæsɪneɪtɪd] v. 使着迷;使陶醉(fascinate的过去分词) adj. 着迷的;被深深吸引的 { :5834}

fishery [ˈfɪʃəri] n. 渔业;渔场;水产业 {ky gre :5973}

seasonal [ˈsi:zənl] adj. 季节的;周期性的;依照季节的 {toefl :6141}

spawn [spɔ:n] n. 卵;菌丝;产物 vt. 产卵;酿成,造成;大量生产 vi. 产卵;大量生产 {toefl gre :6476}

pearson [ˈpɪəsən] n. 皮尔森(人名) { :8126}

underwater [ˌʌndəˈwɔ:tə(r)] n. 水下 adj. 在水中的;水面下的 adv. 在水下 {toefl :9111}

Lt [ ] abbr. 书信电报(letter message);数据处理(Language Translation) { :9242}

courtship [ˈkɔ:tʃɪp] n. 求爱;求婚;求爱期 {toefl :10459}

temperate [ˈtempərət] adj. 温和的;适度的;有节制的 {toefl ielts :10791}

Alaska [əˈlæskə] n. 阿拉斯加州 {ielts :12468}


难点词汇
mimicking ['mɪmɪkɪŋ] n. 仿制,模仿 v. 模仿;戏弄(mimic的ing形式) { :15937}

goldman [ˈgəʊldmən] n. 高曼; Goldman Sachs (高盛公司); 高盛公司是1869年成立的; 现在是华尔街最著名的投资银行。 { :17041}

ell [el] n. 厄尔(旧时量布的长度);字母L;侧房;L形的东西 n. (Ell)人名;(柬)埃;(德、英、葡)埃尔 { :18762}

seasonality [ˌsi:zəˈnæləti] n. 季节性 { :28945}

Terri [ ] [电影]泰瑞 { :29822}

LF [ ] [计] 换行, 低频 [医] 絮凝单位, 絮凝限度 { :30107}

vocalisations [ ] (vocalisation 的复数) n.<主英>= vocalization { :40893}


复习词汇
salmon [ˈsæmən] n. 鲑鱼;大马哈鱼;鲑肉色;鲑鱼肉;橙红色,粉橙色 adj. 浅澄色的 {cet6 gre :3406}

sharks [ʃɑ:ks] n. 鲨鱼( shark的名词复数 ); 坑蒙拐骗的人,诈骗者 { :4438}


生僻词
eeee [ ] [网络] 呃呃呃;月;小紫

whoah [ ] [网络] 哇;呜哇


词组
a shark [ ] [网络] 鲨鱼;一条鲨鱼;一只鲨鱼

courtship song [ ] 求偶声

great white shark [ɡreit hwait ʃɑ:k] n. 噬人鲨(栖居于温热海域) [网络] 大白鲨;大白鲨鸡尾酒;大白鲨啤酒

harbour seal [ ] na. 【动】斑海豹 (Phoca vitulina) [网络] 港海豹

harbour seals [ ] [网络] 海豹

marine biologist [ ] n. 海洋生物学家 [网络] 水生物学家

North Pacific [ ] un. 北太平洋 [网络] 北太平洋地区;北太平洋北太平洋地区;北太平洋滨

salmon shark [ ] un. 鼠鲨 [网络] 太平洋鼠鲨;鲑鲨;鲑鱼鲨

to breed [ ] 配种

white shark [hwait ʃɑ:k] un. 噬人鲨 [网络] 大白鲨;食人鲨;白鲨游泳训练班



单词释义末尾数字为词频顺序
zk/中考 gk/中考 ky/考研 cet4/四级 cet6/六级 ielts/雅思 toefl/托福 gre/GRE
* 词汇量测试建议用 testyourvocab.com