Primitive peoples believe that hair, nail clippings, and lost teeth remain magically linked to the owner even after they have been disconnected from his body.

远古时期的人们认为毛发、剪下的指甲和脱落的牙齿即使离开了人的身体，仍与其主人保持着神秘的联系。

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But the techniques were so primitive back then that it took another decade, until 1993, to nail down the Huntington's gene.

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