Petrifaction may also involve a simultaneous exchange of the original substance of a dead plant or animal with mineral matter of a different composition.

石化还可能同时涉及将死亡的动植物的原有物质与不同成分的矿物质进行交换的作用。

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The dilutions were extreme. Hahnemann was not bothered by the fact that at high dilutions, none of the original substance remained.

稀释是非常极端的，至于经过高度稀释后实际已经没有原始物质残留，哈内曼并不担心。

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Substances are divided into organic substances and inorganic substances in science. Organic substances include proteins, which is often regarded as the original substance of life.

科学把物质划分为有机和无机，有机质是以蛋白质为组成的主体，而蛋白质被认定为生命的原质。

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Racers wax their boards with an old-fashioned preparation called "dope, " whose original recipe called for spermaceti--a fatty substance produced by sperm whales.

FORBES: Magazine Article

This doesn't seem to be looking at the substance of the Messham allegations over the weekend, but about the remit and work of the original Waterhouse inquiry.

BBC: History back in the headlines