"Food additive" means any synthetic compound or natural substance put into food to improve its quality, colour, fragrance or taste, or for the sake of preservation or processing.

食品添加剂：指为改善食品品质和色、香、味，以及为防腐和加工工艺的需要而加入食品中的化学合成或者天然物质。

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Food additive "means any synthetic compound or natural substance put into food to improve its quality, colour, fragrance or taste, or for the sake of preservation or processing."

食品添加剂：指为改善食品品质和色、香、味，以及为防腐和加工工艺的需要而加入食品中的化学合成或者天然物质。

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They have developed a synthetic method for producing the fungal compound and will now attempt to tweak the substance to make it even more effective against tumor cells.

他们已经发现了制造这种真菌复合物的合成方法，现在正努力使得该物质能够更有效地对抗肿瘤细胞。

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An anecdote about mephedrone, a synthetic derivative of a compound found in kat, a stimulant drug popular in parts of east Africa, illustrates the problem.

ECONOMIST: Plain speaking on a highly coloured issue

It's known as an incretin mimetic and is a synthetic version of a compound found in the venom of a Gila monster, a lizard in the southwestern United States.

CNN: Diabetes drug Byetta tied to kidney problems, says FDA