单词	rat-a-tat
释义	rat-a-tat noun ˈra-tə-ˌtat  variants or rat-a-tat-tat ˌra-tə-ˌta(t)-ˈtat  : a rapid succession of knocking, tapping, or cracking sounds Word History Etymology imitative First Known Use 1681, in the meaning defined above
随便看	trigonous trigons trigos trigram trigrammatic trigrams trigraph trigraphic trigraphs trigs Trigynia trigynian trihalide trihalomethane trihalomethanes trihedra trihedral trihedral angle trihedrals trihedron trihedrons trihybrid trihybrids trihydrated trihydroxy

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