英语词汇“protactic”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-新都网

单词	protactic
释义	proˈtactic, a. rare. [ad. Gr. προτακτικ-ός placed in front, f. προτάσσειν to place before or in front.] Placed in front; giving a previous explanation, introductory. 1847in Webster.
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