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》

Use the following table as a rough guide.

下面的表格可作为一个大致上的指南。

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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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As a rough guide, how many days does it take to sell a typical house in various parts of the country?

FORBES: Selling Times in Hot and Cool Markets: Some Benchmarks for Spring and Summer

Britain's Pensions Commission has used a net replacement rate of 80% for workers on average incomes as a rough guide to whether they will have enough to live on in retirement.

ECONOMIST: Ageing and public finances

Photo Rumors hears the two shooters will switch to a newer, faster hybrid (both contrast and phase detection) focusing system that also includes Sony NEX-style manual focus peaking, which provides a rough visual guide as to when a subject is as sharp as possible.

ENGADGET: Fujifilm X20 and X100s details reportedly leak, put focus at center stage