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Their best defence is to re-form their huddle - there's always safety in numbers.
最好的防御就是重新組成企鵝群，人多就安全了
They create a wall of bodies, difficult for the attacker to penetrate.
它們用身體筑起了圍墻，攻擊者難以穿過
The petrel tries to grab any that aren't safely tucked in.
海燕想抓住沒有藏好的企鵝
But the chicks have learnt to fight back.
但是小企鵝已經(jīng)學(xué)會了反擊
Everywhere the petrel goes, he meets a wall of resistance.
無論海燕走到哪里，都會被企鵝墻攔住
Here, his best chance is to break up the huddle then single out a solitary chick.
它最大的機會在于沖破企鵝群，讓小企鵝落單
But even the placid emperor will fight back, and he wields a sharp weapon.
但即便是溫和的帝企鵝也會反擊，何況它還擁有鋒利的武器
For now, the penguins have isolated the threat.
現(xiàn)在，企鵝們已經(jīng)將危險隔絕在外了
As night falls in Peru,
秘魯夜幕降臨
low-light spycams pick up new dangers facing the Humboldt chicks.
弱光偷拍攝像頭捕捉到了洪堡企鵝面臨的新危險
An old enemy is back. Vampire bats.
老敵人回來了。吸血蝙蝠
They normally attack the sea lions along the shore,
它們通常會攻擊海岸邊的海獅
but young penguins provide a tasty alternative.
但小企鵝似乎是更可口的選擇
The adults may be aware of the dangers, but the chicks suspect nothing.
成年企鵝察覺到危險已臨近，但小企鵝卻一無所知
And few creatures are as sneaky as a vampire.
況且它們行事如吸血鬼般詭秘
With so many chicks to choose from, the bats are ultimately guaranteed a meal.
有這么多小企鵝可供選擇，蝙蝠必將迎來一頓大餐
The unlikely scene of a vampire bat feeding on a penguin has never been filmed before.
吸血蝙蝠吸食企鵝這種罕見的畫面之前從未被拍攝到
The greatest danger is loss of blood,
失血是最大的威脅
which, over time weakens the chicks,
這會讓小企鵝逐漸變得孱弱
and the bats also carry diseases, such as rabies.
同時，蝙蝠還會傳播疾病，比如狂犬病
The adults must be on constant alert to repel the bats from the colony.
成年企鵝必須時刻保持警惕，將蝙蝠從企鵝群中趕走
They are far from defenceless.
它們并非毫無還手之力
Kicking dirt in the bat's face is a favourite tactic.
把泥土踢向蝙蝠是它們最喜歡的戰(zhàn)術(shù)
This is their ultimate deterrent.
這是它們的終極絕招
But hitting the right target can be dangerously hit-or-miss.
但要正中目標并非易事
