它们已经成了伊利诺斯河的主人，如今占那里90%的生物量。

They have takenover and now represent 90 percent of the biomass in the Illinois River.

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罗布斯特豆占咖啡豆的40%，较易种植，因为它们较不容易感染病害，它们有一种浓郁的香味，所以它们给任何混合物都添加上一种好的调味剂。

Robusta beans account for 40 percent of the beans and are easier to grow because they are less susceptible to disease. They have a strong flavor, so they add a good punch to any blend.

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而博斯·科普头骨的脸只占整个颅骨大小的五分之一，接近于儿童的水平。

Boskop has a face that takes up only about one-fifth of his cranium size, closer to the proportions of a child.

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