它就是食草性恐龙的主要食物。

It was the main food for herbivorous dinosaurs.

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牛、羊等食草为生。

Cattle, sheep, etc. feed on grasses.

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羊以食草为生。

Sheep chiefly feed on grass.

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因此开发一种新的非食草性动物的纤维显得很有必要。

Therefore it's necessary to develop a new kind of animal fiber.

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这是柠檬草，它们是泰国菜的关键食材。

Lemon grass! They are key ingredient for my Thai food.

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这种动物以草为食。

This kind of animal feed on grass.

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羊主要以草为食。

The sheep feed chiefly on grass.

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羊以草为食。

Sheep live on grass.

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羊以草为食。

Sheep live on grass.

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