Cholesterol is a waxy substance that, among other things, provides structure to the body's cell membranes.

胆固醇是一种蜡状物质，除了其它方面功能，它还是机体细胞细胞膜的构成成分。

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This substance is secreted from cell in the intestinal walls.

这种物质是从肠壁的细胞中分泌出来的。

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Many physicians are still using iv injections of ozone, but it is such a reactive substance, that it reacts immediately with the cell membranes of the white and red blood cells.

许多医生仍在使用臭氧四注射，但正是这种活性物质，它反应立即用白色和红色的血细胞的细胞膜。

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Nope, GM just wanted to talk about its research efforts to store hydrogen onboard fuel-cell vehicles within a solid substance.

FORBES: Hydrogen Gas

Nope, GM just wanted to talk about its research efforts to store hydrogen within a solid substance onboard fuel-cell vehicles.

FORBES: Hydrogen Gas