单词	couldn't
释义	couldn't contraction ˈku̇-dᵊnt  -dᵊn,  dialectal also  ˈku̇-tᵊn(t),  or  ˈku̇nt : could not Word History First Known Use 1646, in the meaning defined above Kids Definition couldn't ˈku̇d-ᵊnt  : could not
随便看	trigonometricians trigonometries trigonometry trigonon trigonotype trigonous trigons trigos trigram trigrammatic trigrams trigraph trigraphic trigraphs trigs Trigynia trigynian trihalide trihalomethane trihalomethanes trihedra trihedral trihedral angle trihedrals trihedron

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