本次实验中使用的维生素是从植物中提取的，是维生素d2。

The vitamin used in this study is a plant-derived type called vitamin D2.

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芳香疗法(使用从植物中提取的物质，以吸入或外用的方法作用于皮肤，也可以内服)。

Aromatherapy (USES remedies derived from plants that are inhaled, applied to the skin or used internally).

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一个未来的好处是从植物中提取的未改变的油，像十九世纪柴油机用的花生油，有很高的粘性，需要引擎改装。

A further advantage is that unmodified oils from plants, like the peanut oil used by Diesel in the 19th century, have high viscosity and require engine alterations.

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