351 篇文章
They need to descend as quickly as possible.
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They need to descend as quickly as possible. 他们得尽快下山

But they'll soon need to
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But they'll soon need to 但很快他们又得

need only about a tenth of the food a carnivorous mammal would.
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need only about a tenth of the food a carnivorous mammal would. 肉食性哺乳动物十分之一的食物量

no need for the jet propulsion used by it's shallow water relatives above.
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no need for the jet propulsion used by it's shallow water relatives above. 不象它的浅海亲戚利用喷射水流的反作用力

for they will replenish the fat reserves that the lemurs need to survive the barren dry season.
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for they will replenish the fat reserves that the lemurs need to survive the barren dry season. 飞蛾是狐猴挺过干季的重要的脂肪来源

If he's to climb to the top of his class he'll need to persevere
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If he's to climb to the top of his class he'll need to persevere 想要在班上名列前矛,必须有毅力

All need to be on maximum alert.
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All need to be on maximum alert. 所有成员必须保持最高警惕

Their numbers are so large, that they need a big territory, lots of fig trees
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Their numbers are so large, that they need a big territory, lots of fig trees 众多的人口意味着要有广大的领土 需要很多无花果树

though they'll need to be well supported.
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though they'll need to be well supported. 尽管需要很好的对象支撑其生长

but they have to change their behaviour if they are to gather what they need on the newly flooded plains.
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but they have to change their behaviour if they are to gather what they need on the newly flooded plains. 但若想在这块刚被洪水淹没的草原上觅食 狒狒也得改变自己的习性