15 篇文章
By taking it's own air supply trapped in a bubble
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By taking it's own air supply trapped in a bubble 它会带着一个空气泡泡

Ideal sites are in short supply and quarrelsome neighbours are all around.
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Ideal sites are in short supply and quarrelsome neighbours are all around. 理想的地方寥寥无几,邻里纠纷时常发生

but they nonetheless need a regular supply of water.
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but they nonetheless need a regular supply of water. 但它们仍须定期补充水

Food is often in short supply
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Food is often in short supply 食物总是很紧缺

In the absence of plants this food chain is based on a continuous supply of bat droppings.
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In the absence of plants this food chain is based on a continuous supply of bat droppings. 在缺少植物的情况下 这里的食物链 完全依赖供应不断的蝙蝠粪便