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单词 preformation
释义
pre·for·ma·tion (prēfôr-māshən)
n.
1. The act of shaping or forming in advance; prior formation.
2. A theory popular in the 1700s that all parts of an organism exist completely formed in the germ cell and develop only by increasing in size.
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更新时间:2025/3/22 6:13:54