This pore space is known as porosity and is expressed as a percentage of the total rock volume.

这个孔隙空间被称为孔隙度，用岩石总体积的百分比表示。

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Moreover, when stained and observed through a microscope, vaults cluster around, and sometimes on, the nuclear-pore complex.

ECONOMIST: Cell biology: The secret of the vaults | The

Nuclear-pore complexes are elaborate protein scaffolds that sit in the membrane around a cell's nucleus.

ECONOMIST: Cell biology: The secret of the vaults | The

Both the BBC and the website of the Guardian newspaper in the UK soon picked up the baton, and the Guardian in particular cultivated a unique tone and community among its sportswriters and readers, who pore over every minute of a football match or cricket games in over-by-over mini-reports.

CNN: The global appeal of 'sticky' live blogs