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

they will all drop to the water surface,
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they will all drop to the water surface, 便会一起落到水面

At dawn the first adult midges start to break out.
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At dawn the first adult midges start to break out. 黎明时分 第一只成蚊破蛹而出

Soon, millions upon millions of newly hatched lake flies are taking to the wing.
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Soon, millions upon millions of newly hatched lake flies are taking to the wing. 不久 成百上千万只新羽化的幽蚊 全都扇动着翅膀飞到空中

Here, in this dead zone the larvae of lake fly midges hide out away from predators.
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Here, in this dead zone the larvae of lake fly midges hide out away from predators. 这个死亡地带成了 幽蚊幼虫躲避天敌的庇护所

In the rainy season they balloon up to the surface
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In the rainy season they balloon up to the surface 每到雨季 它们便充气浮上水面

In the darkness these electric fish hunt
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In the darkness these electric fish hunt 这些鱼用电在黑暗中捕猎

by detecting distortions in the electric field they create around their bodies.
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by detecting distortions in the electric field they create around their bodies. 它们在身体周围形成电场 并感知其变化

The floor of Lake Malawi drops 700 metres into an abyss.
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The floor of Lake Malawi drops 700 metres into an abyss. 马拉维湖底是一个深达700多米的深渊

After dark, predatory dolphin fish emerge from their daytime lairs among the rocks.
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After dark, predatory dolphin fish emerge from their daytime lairs among the rocks. 到了晚上 掠食性的长颌鱼纷纷 游出它们白天潜伏的石缝