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(grammar: pluperfect, verb tense of action previously completed)
过去完成时 n
We use the past perfect to say that one action happened before another.
perfect binding
n
(bookbinding: glued spine)
无线装订 n
perfect competition
n
(when neither producer nor consumer controls price)
自由竞争 n
Perfect competition is an economic theory and assumes many small producers and consumers with perfect information, therefore the market sets the price.
perfect number
n
(number equal to sum of its dividing numbers)
完全数 n
perfect tense
n
(grammar: verb tense describing completed action)
完成时 n
In the Romance languages, there is a perfect tense as well as an imperfect tense.
picture-perfect
adj
US (ideal in appearance, ) 美国用法
完美的,绝妙的 adj
She cleaned her house until it was picture-perfect.
present perfect
n
(grammar: have + past participle) 语法结构为:have + 过去分词
现在完成时 n
present perfect tense
n
(grammar: have + past participle) 语法结构为:have + 过去分词