adjective🔗Sharek倍完全数 Being a generalization of a perfect number. For a given natural number k, a number n is called k-perfect (or k-fold perfect) iff the sum of all positive divisors of n (the divisor function, σ(n)) is equal to kn."While 6 is a perfect number because the sum of its proper divisors (1, 2, and 3) equals 6, 12 is pluperfect because the sum of all its divisors (1, 2, 3, 4, 6, and 12) is twice (24) itself. "虽然6是一个完全数，因为它的真约数（1、2和3）之和等于6，但12是一个2倍完全数，因为它所有约数（1、2、3、4、6和12）之和是它本身的两倍（24）。mathnumberChat with AIVocabulary GamePractice Reading
noun🔗Share过去完成时 The pluperfect tense."The teacher explained the pluperfect after she finished teaching the past perfect. "老师教完过去完成时之后，又讲解了过去完成时。grammarlanguagelinguisticsChat with AIVocabulary GamePractice Reading
noun🔗Share过去完成时 A verb in this tense."The teacher said "had studied" is an example of the pluperfect. "老师说，“had studied”是过去完成时的一个例子。grammarlanguagelinguisticsChat with AIVocabulary GamePractice Reading
adjective🔗Share过去完成时 More than perfect."The student's essay, already impressive in its arguments and evidence, was made pluperfect by the addition of a truly insightful conclusion. "这位学生的论文，论点和论据已经很出色了，但加上了一个极具洞察力的结论后，简直是完美之上的完美。grammarlanguageChat with AIVocabulary GamePractice Reading
adjective🔗Share过去完成时，完成过去时。 (grammar) Pertaining to action completed before or at the same time as another."After the bell rang, the teacher announced that the test paper, which had been pluperfect, was now late. "铃声响后，老师宣布试卷现在交晚了，而这份试卷原本是早就应该交的（过去完成时）。grammarlanguagelinguisticsChat with AIVocabulary GamePractice Reading
adjective🔗Share完全图的，完美图的 Relating to a certain type of graph, complying with the theorem (pluperfect graph theorem) discovered by D. R. Fulkerson in 1970."The mathematician confirmed that the graph was pluperfect, meaning it adhered to Fulkerson's theorem. "这位数学家确认该图是完全图/完美图，这意味着它符合福尔克森定理。maththeorytechnicalChat with AIVocabulary GamePractice Reading
adjective🔗Share极好的，完美的. Used as an intensifier in various interjections."What in the pluperfect hell is going on here?!"这到底是怎么回事，简直糟透了？！grammarlinguisticswordChat with AIVocabulary GamePractice Reading
