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After realizing that we would eventually be able to build molecular machines that could arrange atoms to form virtually any pattern that we wanted, I saw that an awful lot of consequences followed from that.

当我意识到我们最终能够制造出分子机器，可以把原子排列成我们想要的任何形状之后，我看到了很多可怕的后果。

— K. Eric Drexler 埃里克·德雷克斯勒