As a rough guide, a horse needs 2.5 percent of its body weight in food every day.

作为一个大致的标准，一匹马每天需要相当于它体重2.5%的食物。

《柯林斯英汉双解大词典》

However, it should be considered as a rough guide because it may not correspond to the same body fat percentage in different individuals.

但是，它应当被视为一种粗略的指导，因为在不同的个人身上，它或许不能反映为同样的身体脂肪百分比。

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They'd both looked down at the snake then, its eyes like two pebbles, its body all but indistinguishable from the length of rough wood it was stretched out on.

于是，他们俩低下头看着蛇，它的眼睛就像两粒卵石一般，躯体如粗糙的木头伸展着，几乎分辨不出它的轮廓来。

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It gives a rough indication of what a body of text is about.

FORBES: Visualization: A Picture Tells A Thousand Words

But Donald MacRae said he had found the teenager to be "down" and that Liam had been sleeping rough in the derelict building where his body was later discovered.

BBC: Liam Aitchison murder: No murder weapon found

The IS C suffers from body flex, which is most noticeable on rough surfaces.

FORBES: 2011 Lexus IS 350 C Test Drive and Review: Managing the Convertible Compromise