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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Look at this granite carefully. The red-colored minerals account for some 70% of the total rock. They are mostly rectangular in shape with a grain size of 3 millimeters.

请仔细观察这块花岗岩石，其中的红色矿物占全岩矿物的百分之70，而它们的颗粒形态多数是矩形的，颗粒的粒径在3个毫米。

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Currently a total of 152 individuals and companies hold fishing rights for hake, monkfish, horse mackerel, large pelagics, crab and rock lobster.

现在，共有152家个人和公司拥有对鳕鱼、马胶鱼、大型中上层鱼类、蟹类和螯虾类的捕捞许可权。

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Davis told CNN that what made Marshall's shots unique was that he always demanded total access to the rock stars.

CNN: STORY HIGHLIGHTS

After correctly answering a total of 62, 273 questions and leading for more than 24 hours, Rock was narrowly beaten by 2, 926 answers by a pupil called Tatiana D from Australia who overtook him with just three hours to go.

BBC: NEWS | UK | Scotland | Edinburgh, East and Fife | Pupil second in world maths test

Perhaps you should go all the way to a cheap index fund, like Vanguard Index Total Stock Market, which has both low expenses (0.2% annually) and rock-bottom turnover (3% ).

FORBES: The hidden cost of trading