英语词汇“free central placentation”造句的方法、技巧、例句及翻译-英语例句辞典

单词	free central placentation
例句	free central placentation Thus, in the case of marginal placentation the number must be limited by the narrow space from which they proceed, whereas in parietal and free central placentation the ovules are generally numerous. Vegetable Teratology An Account of the Principal Deviations from the Usual Construction of Plants In the flowers of Saponaria officinalis Dr. Masters has observed instances of both marginal and free central placentation. The Origin of Species by means of Natural Selection, 6th Edition
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