The proportion of empty space in a rock is known as its porosity.

岩石中空隙的比例被称为孔隙度。

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Thus a proportion of the total volume of any sediment, loose or cemented, consists of empty space.

因此，无论是疏松或胶结，沉积物总体积都有一部分是由空隙组成的。

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One day, the empty space on my bookcase drew my attention.

一天，书架上空荡荡的地方引起了我的注意。

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He turned, and with a firm and quick step he walked across the empty space.

VOA: special.2009.04.18

So they weren't hitting anything, we're dealing with mostly empty space.

但他还意识到，当它们碰到东西的时候。

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But finding new shopowners to fill empty space is increasingly difficult.

VOA: standard.2009.12.20

Once I put empty space in my day, a slew of ideas and insights began to emerge.

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One of his first moves: compressing the remaining employees onto fewer floors and subleasing the empty space.

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And to have lost Billy, you know, it's really going to be an empty space in my heart.

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