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If the penguins are to fish in peace,
企鵝如果不想捕魚(yú)時(shí)被打擾
they must brave the open ocean.
必須挑戰(zhàn)寬闊的海域
Back with the Emperors, the females are now firmly in charge.
回到帝企鵝這邊，幼雛已經(jīng)完全交給了母企鵝
Their first big challenge arrives - an Antarctic blizzard.
它們需要面臨的第一個(gè)挑戰(zhàn)是極地暴風(fēng)雪
The penguins protect their chicks by turning their backs to the wind.
企鵝們背對(duì)暴風(fēng)，保護(hù)小企鵝
But soon, it's not enough.
但很快，這招就不管用了
The chicks are still exposed to the swirling winds.
雛鳥(niǎo)們?nèi)匀槐换匦L(fēng)吹得瑟瑟發(fā)抖
To survive the worsening weather, they must huddle closer together.
要想在不斷惡化得天氣下求生，它們要靠得更近
They start to gather in even greater numbers.
越來(lái)越多的企鵝聚集在一起
A huge mass of penguins can share warmth and shelter.
一大群企鵝相互庇護(hù)與溫暖著對(duì)方
But the crush means it's a risky place for a young chick to be.
但是對(duì)于年幼的小企鵝來(lái)說(shuō)，擁擠也意味著危險(xiǎn)
At first, penguins with chicks circulate on the outside, avoiding the pressure within.
一開(kāi)始，企鵝帶著雛鳥(niǎo)徘徊在部落邊緣，避免群集中間的擠壓
As the weather worsens, they'll all have to look for a place to tuck in.
當(dāng)天氣變得更糟，它們不得不開(kāi)始擠成一團(tuán)
Eventually, a huge huddle forms.
最終形成了龐大的企鵝群
While those in the centre are warm and protected, those on the outside are still struggling.
中間的企鵝被周?chē)踩譁嘏吘壍钠簌Z卻仍在掙扎
To share the heat around, the penguins take tiny steps to change position.
為了分散熱量，企鵝們挪動(dòng)著小步改變自己的位置
Waves of movement ripple through the huddle,
企鵝浪在企鵝群里面擴(kuò)散
giving everyone a chance to have a go in the centre.
讓每只企鵝都有鉆進(jìn)中央的機(jī)會(huì)
The huddle is so efficient, penguins in the inner core can even overheat.
聚集取暖相當(dāng)有效，有時(shí)企鵝在中間甚至?xí)X(jué)得太熱
As these penguins try to cool down, the colony starts to break up.
那些企鵝想出去涼快一下，于是企鵝群開(kāi)始分散
The collapse acts as a release valve, shedding excess heat.
就好比擰開(kāi)放氣閘，多余的熱量也因此擴(kuò)散
But it's dangerous for the chick.
然而對(duì)于幼雛，這卻相當(dāng)危險(xiǎn)
