Objective: The chemical composition, extraction and biological activity of antioxidant substance of sweet potatoes were studied.
目的：研究甘薯中抗氧化物质的含量，化学成分，分离提取及其生物活性。
This is because tomatoes contain a high concentration of a substance called lycopene, which is an antioxidant.
这是因为番茄中含有高浓度的番茄红素，是一种抗氧化剂。
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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