The surface ratio of conus to disc was calculated using a planimeter.

我们使用面积计测量圆锥与视神经盘表面比值。

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Objective: To study the effect of zinc supplement on bone-contacting implant surface ratio (BCSR).

目的：探讨微量元素锌对种植体骨整合率的作用。

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The bigger the animal is, the lower its surface-to-volume ratio; for every ounce of body mass, there is proportionately less surface through which heat can escape.

动物体型越大，其体表体积比越低；躯体每增加一盎司的重量，所能散发热量的表面就成比例减少。

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The result, they claim in a paper that will appear this month in the Journal of Physical Chemistry, is a nanofibre material with an extremely high ratio of surface-area to volume.

ECONOMIST: Space-age soot

But as an object gets smaller, the ratio between its surface area and its volume rises.

ECONOMIST: Small wonders

The family of these materials includes much-touted, carbon-based members such as graphene and nanotubes, and are notable in part for their surface area-to-weight ratio.

BBC: 'White graphene' soaks up pollutants and can be re-used