A few days later, John asked Mary to look at another experiment. He took her into a long, quiet room at the back of the factory. The room was full of the noises of small animals.
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'I've been testing the waste products,' he said. 'Here, look at this.' He gave her a sheet of paper. 'Some of these rats have had the waste products in their food and drinking water. There's no real problem yet. One or two have become ill, but not many. There's nothing very serious.'
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Mary read the results carefully. She didn't like this kind of experiment, but she knew it was necessary. And John was right; no rats had died, and not very many were ill.
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第五章: 新实验
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