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X射线揭示哺乳动物祖先产卵的首个证据

图中描绘了一只夭折于蛋内的丽齿兽幼崽,其原型化石为哺乳动物祖先产卵的观点提供了确凿证据。 (Sophie Vrard/Benoit 等,PLOS One,2026)

Site news 2026-04-15 319 views
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I - Wikipedia

I, or i, is the ninth letter and the third vowel letter of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is i (pro...

en.wiktionary.org

i - Wiktionary, the free dictionary

Here follow ſome few lines in the original, which not underſtanding ihave omitted. ]Laſtly that amidſt ſo many viciſſitudes of fortune, to which I have been expoſed, amongſt all the goods, iſay, and evils, the joyfull...

www.thefreedictionary.com

I - definition of I by The Free Dictionary

Learn the meaning, pronunciation, and grammar of the letter I and the pronoun I in English. Find out the symbols, abbreviations, and expressions related to I in different fields and contexts.