在过去二十年中用于科学实验的动物数量大大减少了.翻译为英语

豆瓣晚幕 1年前 已收到4个回答 举报
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xiaoxiao118 幼苗

共回答了13个问题采纳率：92.3% 举报

The number of animals used for scientific experiment had been greatly reduced during the last two decades.( last score of years, last twenty years.)

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大壮男di 幼苗

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In the past twenty years,the number of the animals that are used for experimenting has decreased a lot.

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张萌发 幼苗

共回答了123个问题 举报

The amount of animals that were used for science experiments have been reduced greatly in the past 20 years.

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慧芷兰心 幼苗

共回答了23个问题采纳率：82.6% 举报

In the past twenty years, the number of animals used in scientific experiments greatly reduced

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