but

1820 篇文章
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

but they must still survive the attacks of other, more specialised, birds of prey.
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but they must still survive the attacks of other, more specialised, birds of prey. 但它们仍须躲过 其它更专业的猛禽的攻击

But not all will return.
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But not all will return. 但并非所有的蝙蝠都能返回

But the dissolving power of rainwater has other, much more dramatic effects underground.
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But the dissolving power of rainwater has other, much more dramatic effects underground. 不过在地下 雨水的溶解作用 还能产生其它更壮观的效果

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

but in New Zealand some have turned this darkness to their advantage.
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but in New Zealand some have turned this darkness to their advantage. 但是在新西兰 有些动物却能利用黑暗的条件

But the channels are also the playground for restless young macaques.
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But the channels are also the playground for restless young macaques. 水道也是顽皮的小猴子们的游乐场

but continue their journey to the sea.
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but continue their journey to the sea. 而是一直奔向大海

but it's dwarfed by the world's largest lake -
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but it's dwarfed by the world's largest lake - 但它远比不上世界上最大的湖泊

But these spiralling columns hundreds if metres high
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But these spiralling columns hundreds if metres high 这些高达数百米的螺旋型“烟”柱