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████    重点词汇
████    难点词汇
████    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 within a couple of months turns
vast areas of it a dense green

Animal life reacts to
the blooming sea

Although these polyps look
like small anemones,

They're about to change
into something else

As they separate, they reveal
themselves to be tiny, common jellyfish

They are less than
3 millimetres across

Within a few months they will
have assembled into vast swarms

Minute copepods are part
of their staple diet

These appear every spring in vast numbers
and graze on the Phytoplankton bloom

Their beating legs create currents
that sweep the little algae

into the basket-like filters
around their mouths

On this microscopic scale,
water is so viscous that

the Phytoplankton can't swim
against the current

Whilst feeding, sensors on the copepod's
antennae give warning of dangers ahead

Lighting by lasers reveals that feeding
copepods leave wakes behind them,

rather like jet trails in the sky

Slightly larger floating predators

are able to use these trails
to find their prey

A close call - but some predators
are simply too large to avoid

Jellyfish!

They may appear to be delicate as well as
beautiful, but they are deadly hunters

With every pulse of the delicate
bells plankton-rich water

is drawn into their lacy throats
and pushed out again,

leaving behind copepods stuck
to the membranes

A single sea-nettle jellyfish
only a few centimetres

across can collect thousands
of copepods in a day

So the killing power of giants
like these is hard to estimate

Each of these jellyfish
weighs up to 30 kilos

and has tentacles stretching
over 8 metres

But there are even greater dangers
awaiting the copepods

By the late spring the baby common
jellyfish are fully grown

They gather in millions, forming
immense swarms hundreds of metres long,

which filter out all the small
planktonic animals in their path

Nevertheless, there are such
astronomic numbers of copepods


知识点

重点词汇
bloom [blu:m] n. 花；青春；旺盛 vt. 使开花；使茂盛 vi. 开花；茂盛 n. (Bloom)人名；(瑞典、西)布洛姆；(英)布卢姆 {cet4 cet6 ky toefl ielts :6582}

blooming [ˈblu:mɪŋ] v. [植] 开花（bloom的ing形式） adj. 盛开的；妙龄的 {gre :6582}

staple [ˈsteɪpl] n. 主要产品；订书钉；主题；主食 adj. 主要的，大宗生产的；常用的；纺织纤维的 vt. 把…分级；钉住 {ky toefl ielts gre :7008}

graze [greɪz] n. 放牧；轻擦 vi. 吃草；擦伤 vt. 放牧；擦伤 {cet6 ky toefl ielts gre :7059}

tentacles ['təntəkəlz] n. [动] 触手；[动] 触须（tentacle的复数） { :7471}

algae [ˈældʒi:] n. [植] 藻类；[植] 海藻 {toefl :8285}

centimetres [ˈsentiˌmi:təz] n. 厘米( centimetre的名词复数 ) { :8893}

swarms [swɔ:mz] n. 蜂群，一大群( swarm的名词复数 ) v. 密集( swarm的第三人称单数 ); 云集; 成群地移动; 蜜蜂或其他飞行昆虫成群地飞来飞去 { :8983}

microscopic [ˌmaɪkrəˈskɒpɪk] adj. 微观的；用显微镜可见的 {cet6 toefl gre :9581}

millimetres [ˈmili-ˌmi:təz] n. 毫米( millimetre的名词复数 ) { :9848}

kilos [kɪ'ləʊs] n. 公斤；千克 { :11522}

polyps [ˈpɔlips] n. 珊瑚虫（水螅型），息肉( polyp的名词复数 ) { :13529}


难点词汇
antennae [ænˈteni:] n. [电讯] 天线（等于aerial）；[昆] 触须；[植] 蕊喙；直觉 { :16450}

lacy [ˈleɪsi] adj. 花边的；丝带的 n. (Lacy)人名；(英)莱西；(西)拉西；(德)拉齐 { :16651}

anemones [əˈneməniz] n. 银莲花( anemone的名词复数 ); 海葵 { :16775}

viscous [ˈvɪskəs] adj. 粘性的；黏的 {cet6 toefl gre :17171}

jellyfish [ˈdʒelifɪʃ] n. 水母；[无脊椎] 海蜇；软弱无能的人 {toefl :18731}

phytoplankton [faɪtəʊ'plæŋktən] n. [植] 浮游植物（群落） { :21785}

planktonic ['plæŋtɒnɪk] adj. 浮游生物的，浮游的 { :31717}

copepods [kəʊp'pɒdz] 桡足类 { :37069}

astronomic [ˌæstrə'nɒmɪk] adj. 天文学的；星学的 { :48439}


词组
filter out [ˈfiltə aut] un. 〔物〕滤光；滤出；慢慢传出；听不进去 [网络] 过滤；滤除；过滤掉

graze on [ɡreiz ɔn] [网络] 吃

microscopic scale [ ] 《英汉医学词典》microscopic scale 微观水平

phytoplankton bloom [ ] [网络] 浮游植物大量繁殖；浮游植物潮；水华

staple diet [ ] n. （某人或动物的）主要食物；家常便饭；主要内容；惯用手段 [网络] 主食；圣诞大餐；主要饮食



单词释义末尾数字为词频顺序
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