单词	check digit
释义	check digitˈcheck ˌdigit noun [countable] technical the number on the far right of a bar code. It is used to check that the information on the bar code is correct.
随便看	Quito quits quitter quiver quixotic quiz quizmaster quizzical quizzically quo quoit Quonset hut Quorn quorum quota quotable quotation quotation mark quote quoth quotidian quotient Quran q.v. QVC

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