to

5665 篇文章
that for most of the year they would be unable to cross it.
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that for most of the year they would be unable to cross it. 它们一年中大部分时间都无法穿越这里

The bats left Mexico a few days earlier to escape the heat of summer
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The bats left Mexico a few days earlier to escape the heat of summer 蝙蝠数日前离开墨西哥以躲避酷暑

and are on their way north to the southern United States.
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and are on their way north to the southern United States. 正向北飞往美国南部

But birds are not the only animals to benefit from the presence of the cacti.
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But birds are not the only animals to benefit from the presence of the cacti. 不过鸟并非唯一从仙人掌那里 获得好处的动物

the saguaros bloom at night to attract visitors.
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the saguaros bloom at night to attract visitors. 弁庆柱在晚上开花 吸引了不少拜访者

When full, a saguaro stem can store up to five tonnes of water
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When full, a saguaro stem can store up to five tonnes of water 吸饱水后 弁庆柱的茎干中 已储存了5吨左右的水

and that's enough to see it through many months of drought.
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and that's enough to see it through many months of drought. 这足以帮助它们度过几个月的旱季

are ready to take full advantage of it.
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are ready to take full advantage of it. 准备充分利用雨水

and the pleats on its trunk enable it to expand rapidly.
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and the pleats on its trunk enable it to expand rapidly. 茎上的皱褶使之能迅速膨胀

animals and plants have to be ready to make the most of it.
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animals and plants have to be ready to make the most of it. 所有动植物都必须 做好准备尽量地利用它们