英语词汇tetrad怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	tetrad
释义	tetrad tetrad n: (group of four) SC 四个一组 sì gè yì zǔ
随便看	discountenance discounter discount rate discounts discount store discourage discouraged discouragement discouraging discourse discoursed discourteous discourteously discourtesy discover discovered discoverer discovery discredit discreditable discredited discreet discreetly discrepancy discrepant

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