160 篇文章
Once underground,
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Once underground, 一旦进入地下

Once stuck,
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Once stuck, 一旦被粘住

Once its lines are set,
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Once its lines are set, 当一排丝架设完毕后

Once the flies have mated,
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Once the flies have mated, 幽蚊完成交配之后

once they have a hold, they never let go.
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once they have a hold, they never let go. 一旦被它逮住 猎物再无逃脱的机会

It was once considered a kind of raccoon,
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It was once considered a kind of raccoon, 它曾经被认为是浣熊的一种

These spires are the eroded remains of an ancient seabed that once stretched between the two continents.
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These spires are the eroded remains of an ancient seabed that once stretched between the two continents. 曾经连接两块大陆的古老海床 侵蚀后留下了一座座尖耸的山峰

the sun once more rises over Antarctica.
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the sun once more rises over Antarctica. 太阳重新在南极上空升起

A pack this size kills once a day and everything is shared.
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A pack this size kills once a day and everything is shared. 这种规模的狗群每天都得进行一次捕杀 并且一起分享猎物

Once the seals have finished breeding
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Once the seals have finished breeding 等到海豹结束繁殖