a set of letters or symbols in a fixed order used to represent the basic set of speech sounds of a language, especially the set of letters from A to Z
字母表(尤指从A到Z的一套字母)。
the basic elements in a system which combine to form complex entities
基本要素
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DNA's 4-letter alphabet .DNA的四字母基本要素。
"early 16th cent.: from late Latin