There are some nutrient sources - such as selenomethionine, a widely used form of selenium, boron for bone health and chromium yeast for regulating blood sugar - that aren't on the list.

有很多营养成分未被列入‘合格清单’，比如硒代蛋氨酸、有益于骨骼的硼和调节血糖的有机铬。

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In its simplest form fermentation processes can be just the mixing of microorganisms with a nutrient broth and allowing the components to react.

最简单的发酵过程可以只是把微生物与营养培养基混合，使其中的组分发生反应。

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The thyroid gland readily absorbs iodine in any form, (including radioactive iodine...) and it retains this element as a nutrient for extended periods.

甲状腺容易以各种形式吸收碘(包括放射性碘…)，并作为营养长期保留。

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Until the 20th Century, the nutrient element only came to Earth in a reactive form that is usable by plants and animals, thanks to certain microbes in soil and water (and to a smaller extent in lightning strikes).

BBC: Leaving our mark: Fossils of the future