one

963 篇文章
This one looks a little smaller.
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This one looks a little smaller. 这头看起来小一点

This one still has water,
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This one still has water, 这个还有水

But on most tropical plains across our planet, the wet season is followed by a dry one.
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But on most tropical plains across our planet, the wet season is followed by a dry one. 然而地球上的绝大多数热带草原 在经历雨季后总是要经历旱季的

It's also exceptionally dry for one very big reason,
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It's also exceptionally dry for one very big reason, 而且这里又干燥异常,那是因为一个很大的原因

Male bison weigh in at one ton.
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Male bison weigh in at one ton. 公野牛重达一吨

Sometimes one mouth simply isn't enough.
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Sometimes one mouth simply isn't enough. 有时候 一张嘴根本就不够

There are no bushes, no trees. There's only one thing to hide behind.
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There are no bushes, no trees. There's only one thing to hide behind. 这里没有矮小的灌木 也没高大的乔木 只有一样东西可以藏身其后

Two million are thought to live here, but no one really knows.
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Two million are thought to live here, but no one really knows. 共约两百万只瞪羚生活在此处 但具体数量仍不得知

one of the planet's great migrations is underway.
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one of the planet's great migrations is underway. 地球上规模最大的迁徙大军正浩浩荡荡地行进着

extends one third of the way around our planet.
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extends one third of the way around our planet. 便横跨了地球的三分之一