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无尽汪洋 08 - 英语听力
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[00:00.43]Some of these ocean vagrants may offer protection,
[00:03.44]like this pyrosome is doing for the shrimp.
[00:06.13]In the world's deepest ocean,
[00:08.02]averaging over two and a half miles deep,
[00:11.14]new species are constantly being discovered.
[00:14.78]Like this seahorse, never filmed before.
[00:18.37]At dawn,
[00:18.98]these little-known creatures retreat into the safety of the abyss.
[00:23.99]But there are some predators that can follow them down.
[00:27.38]Short-finned pilot whales are accomplished deep-sea divers.
[00:31.81]Leaving the barren upper layers behind,
[00:34.16]they can swim over half a mile down
[00:36.87]and use their sonar to track the huge shoals of squid.
[00:41.33]But they too are being tracked.
[00:44.99]Oceanic whitetip sharks, three metres long,
[00:49.73]and completely at home in the open ocean.
[00:53.18]They may not be able to dive deep enough
[00:55.36]to catch the squid themselves,
[00:57.22]but that won't stop them hanging around for scraps.
[01:09.77]Or maybe they're sizing up the calf.
[01:12.79]This one, however, is well guarded by the bulls.
[01:15.96]But in the endless blue,
[01:17.62]where the odds of finding a meal are so low,
[01:20.50]even the slimmest opportunity is worth a try.
[01:22.86]Perhaps this is why
[01:22.86]the oceanic whitetip is thought to be responsible
[01:22.86]for more attacks on shipwrecked sailors than any other shark in the Pacific.
[01:22.86]
[00:03.44]like this pyrosome is doing for the shrimp.
[00:06.13]In the world's deepest ocean,
[00:08.02]averaging over two and a half miles deep,
[00:11.14]new species are constantly being discovered.
[00:14.78]Like this seahorse, never filmed before.
[00:18.37]At dawn,
[00:18.98]these little-known creatures retreat into the safety of the abyss.
[00:23.99]But there are some predators that can follow them down.
[00:27.38]Short-finned pilot whales are accomplished deep-sea divers.
[00:31.81]Leaving the barren upper layers behind,
[00:34.16]they can swim over half a mile down
[00:36.87]and use their sonar to track the huge shoals of squid.
[00:41.33]But they too are being tracked.
[00:44.99]Oceanic whitetip sharks, three metres long,
[00:49.73]and completely at home in the open ocean.
[00:53.18]They may not be able to dive deep enough
[00:55.36]to catch the squid themselves,
[00:57.22]but that won't stop them hanging around for scraps.
[01:09.77]Or maybe they're sizing up the calf.
[01:12.79]This one, however, is well guarded by the bulls.
[01:15.96]But in the endless blue,
[01:17.62]where the odds of finding a meal are so low,
[01:20.50]even the slimmest opportunity is worth a try.
[01:22.86]Perhaps this is why
[01:22.86]the oceanic whitetip is thought to be responsible
[01:22.86]for more attacks on shipwrecked sailors than any other shark in the Pacific.
[01:22.86]
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