Teeth can give a rough indication of a dog's age.

通过牙齿可以粗略地推算狗的年龄。

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The size of each bubble is a rough indication of the amount of data in that data set. Some interesting items are

各气泡的大小大致表示了对应数据集中的数据量。

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The preceding chapter provided a rough indication of priorities that could be used for accident minimization, and use of good procedures comes last.

前面章节粗略阐述了减小事故的优先方法，而程序手段居于末位。

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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

Of course, the nature of the figures relating to illegal immigration is that they can only be a rough indication of those who have successfully managed to enter the UK without permission.

BBC: Turning the tide of immigration