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5665 篇文章
It takes more than 30 days to complete one.
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It takes more than 30 days to complete one. 每个燕窝得花上30多天才能完工

takes complete than more days it to one
Like bats they use echolocation to navigate.
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Like bats they use echolocation to navigate. 和蝙蝠一样 它们也利用回声定位来导航

echolocation bats navigate use like they to
We need lights to see what's going on,
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We need lights to see what's going on, 我们必须有光才能看清前方的路

going what's lights we need see to on
but in the pitch black the swiftlets manage unerringly to locate their individual nesting sites,
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but in the pitch black the swiftlets manage unerringly to locate their individual nesting sites, 但是金丝燕却能在黑暗中 准确无误地到达自己的筑巢点

sites nesting locate unerringly manage pitch swiftlets black individual their in the to but
these commuters rely on their loud clicks to find their way through the cave passages in total darkness.
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these commuters rely on their loud clicks to find their way through the cave passages in total darkness. 这些住客利用它们响亮的叫声 在漆黑一片的洞穴通道内辨别方向

clicks loud commuters passages cave find rely way total through these their darkness in the to on
The wheeling bats seem to confuse a rufus-bellied eagle,
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The wheeling bats seem to confuse a rufus-bellied eagle, 旋绕的蝙蝠群似乎已将 棕腹隼雕弄得晕头转向

rufus-bellied confuse wheeling bats eagle seem the to a
to hunt for insects in the forest outside.
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to hunt for insects in the forest outside. 在森林外围捕食昆虫

outside hunt insects forest for in the to
allows some animals to gather there in huge numbers.
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allows some animals to gather there in huge numbers. 使得大批动物到此聚集

allows huge numbers gather animals some in to there
Rivers that flow over limestone often seem to completely disappear.
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Rivers that flow over limestone often seem to completely disappear. 流经石灰岩的河川 到最后似乎总是无影无踪

often limestone flow rivers seem completely disappear that to over
But the glow worm doesn't leave everything to chance.
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But the glow worm doesn't leave everything to chance. 不过 萤火虫并不会听天由命

doesn't worm glow leave chance everything the to but