使众多的人接触有毒物质，却征得的同意，并常常将蒙在鼓中。
We have subjected enormous Numbers of people to contact with these poisons, without their consent and often without their knowledge.
我们使众多的人接触这些有毒物质，却没有征得他们的同意，并常常将他们蒙在鼓中。
We have subjected enormous Numbers of people to contact with these poisons, without their consent and often without their knowledge.
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