You need a seat which supports your back and the book should be at the right distance from your eyes.

你需要一个能支撑你背部的座位，书本应与你的眼睛保持适当的距离。

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At a railway crossing not watched by any one, warning marks shall be set up at a certain distance from the crossing.

无人看守的铁路道口，应当在距道口一定距离处设置警示标志。

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Mr Rubin sat at a discreet distance: "I always liked to be away from the centre," he wrote in his autobiography.

鲁宾坐在不显眼的远处：“我总是想远离中心，”他在自传中写道。

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They come so instinctively and easily it's difficult, and sort of unnatural, to step back and explore them scientifically but if we're going to be scientists and look at the mind from a scientific perspective we have to get a sort of distance from ourselves and ask questions that other people would not normally think to ask.

他们来得如此本能，容易,这是困难的，有某种超自然韵味，退后，从科学角度研究他们,但如果我们打算成为科学家,从科学角度,看待心理,我们需同我们自身保持某种距离,问问题,问其他人通常不想问的。

耶鲁公开课 - 心理学导论课程节选

One form of the technology can read 30 notes a second, although the tags have to be separated from each other by a distance of at least 2cm to reduce interference.

ECONOMIST: Money of the future may almost literally talk

The whole apparatus works directionally, so that it can be aimed at an offending talker from a moderate distance.

FORBES: The Japanese Speech Jamming Gun

The difference between native 1080p and native 4K at six meters, however, was more marked -- it could only be described as 'subtle' at a distance of nine meters from the screen.

ENGADGET: This is what native 4K home cinema looks like on Sony's VPL-VW1000ES projector