"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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Bisphenol a, a common compound found in many plastics, has been listed as a toxic substance in Canada but is still deemed safe in the U.S..

双酚a，在许多塑料产品中常用的一种物质，现在已经被加拿大写在有毒物质的清单上了，但是，在美国，它仍然被认为是安全的。

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An antioxidant is a chemical compound or substance that inhibits oxidation.

抗氧化物是一种化学复合物或物质，可抑制氧化。

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When they then gave the animals a compound that blocked substance P, they found that it also blocked the distress response.

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Added to that eye-widening pub fact is that the heat insulation applied liberally to the engine bay and underside is a substance called 'Aerogel' - a compound formulated by NASA to insulate the Mars Rover.

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