It is an organic substance and is a petrified rosin of ancient trees related to rosin.
一种有机物质。它是一种含一些有关松脂的古代树木的石化松脂。
This test is usually used for determining the content of inorganic impurities in an organic substance.
该检验通常用用检测一个有机物质中的无机杂质的含量。
However, the Karelian Birch egg was the only one to use an organic substance (wood) as a primary construction element.
卡累利阿桦木蛋是唯一一个使用有机物质(木材)作为主要元素。
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