怎么理解at less than 100 times the levels found in such foods

3 怎么理解at less than 100 times the levels found in such foods

Preservatives, at the level included in commercial pet foods, have never been scientifically demonstrated to cause any problems in pets (or people) at less than 100 times the levels found in such foods. On the other hand, the current policy for many cat food manufacturers is toward using natural preservatives, such as vitamins C and E.

出处：https://www.thesprucepets.com/choosing-cat-food-551958

请问老师加粗部分怎么理解？可以翻译一下第一句话吗？谢谢！

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分类：难句分析

最佳答案 2021-12-11 23:34

用不超过宠物食品中的防腐剂含量100倍的剂量作实验，也没有显示出对宠物（或人）有任何不良影响。

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曹荣禄 -

擅长：动词用法,句法问题 | 采纳率 82% | 回答于 2021-12-11 23:04

3 怎么理解at less than 100 times the levels found in such foods

最佳答案 2021-12-11 23:34

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