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iff

/ɪf/

Meanings
conjunction

当且仅当，若且唯若

If and only if; used to show that the truth values of two statements are the same.

Examples :

"You can graduate iff you pass all your classes. "
只有当你通过所有课程，你才能毕业。
grammar linguistics logic philosophy math

Related Words

Illustration homework

homework noun

/ˈhəʊmˌwɜːk/ /ˈhoʊmˌwɝk/

作业, 功课。

"You must do your homework before you can watch television."

你必须先做完作业才能看电视。

Illustration obsolete

obsolete adjective

/ˈɒbsəliːt/ /ɑbsəˈliːt/

过时的，陈旧的。

"The slide rule is now obsolete; calculators are used for calculations instead. "

计算尺现在已经过时了，人们现在用计算器来做计算。

Illustration values

values noun

/ˈvæljuːz/

价值观，价值观念.

"The Shakespearean Shylock is of dubious value in the modern world."

莎士比亚笔下的夏洛克，在现代世界的价值观念中，其价值颇受质疑。

Illustration statements

statements noun

/ˈsteɪt.mənts/

声明，陈述，表述。

"The teacher asked us to write statements about what we learned in class today. "

老师让我们写一份关于今天课堂上所学内容的陈述。

Illustration classes

classes noun

/klasɪz/ /klɑːsɪz/ /kleəsɪz/

类别，种类，班级

"Often used to imply membership of a large class."

通常用来暗示属于一个大的类别。

Illustration spelling

spelling verb

/ˈspɛlɪŋ/

着迷，迷惑.

"The magician's words seemed to spell her into a deep sleep. "

魔术师的话语似乎让她着了魔，陷入了沉睡。

Illustration rephrases

rephrases verb

/ˌriːˈfreɪzɪz/ /riˈfreɪzɪz/

改述，改写。

"The teacher rephrased the question to make it easier for the students to understand. "

老师把问题换了一种说法，让学生更容易理解。

Illustration rectangle

rectangle noun

/ˈrɛktæŋɡ(ə)l/ /ˈrɛkˌtæŋɡəl/

长方形，矩形

"The picture frame is a rectangle. "

这个相框是个长方形。

Illustration square

square noun

/skwɛə(ɹ)/ /skwɛɚ/

正方形

"The floor tiles were arranged in perfect squares. "

地板砖被铺成了一个个完美的正方形。

Illustration graduate

graduate noun

/ˈɡrædʒuət/ /ˈɡrædʒueɪt/

毕业生，毕业者.

"If the government wants graduates to stay in the country they should offer more incentives."

如果政府希望大学毕业生留在国内，就应该提供更多的激励措施。

Illustration logically

logically adverb

/ˈlɑdʒɪkli/ /ˈlɒdʒɪkli/

合乎逻辑地，有逻辑地

"My brother logically concluded that if he wanted to get a good grade on the test, he needed to study more. "

我弟弟经过合乎逻辑的推理，得出结论：如果他想在考试中取得好成绩，就需要更加努力地学习。

Illustration equivalent

equivalent noun

/ɪˈkwɪvələnt/

等价物，同等物

"A pound of apples is the equivalent of two dollars at the market. "

在市场上，一磅苹果相当于两美元的价值。