The phrase “black and white” is a common binomial expression.
語源（etymology）
ラテン語 bi-（2つ）+ nomen（名前）に由来。
「2つの名前（語）」が並んで一つの意味を成すイメージ。
類義語（synonyms）
類義語
例文
expression
“Give and take” is a useful expression in communication.
phrase
“Trial and error” is a common phrase in problem-solving.
idiom
“Back and forth” is a frequently used idiom in English.
反義語（antonyms）
反義語
例文
monomial（数学的文脈）
In algebra, a monomial has only one term.
simple word
Unlike a binomial, a simple word contains no conjunction.
コロケーション（collocations）
コロケーション
例文
common binomial
“More or less” is a common binomial in daily speech.
binomial expression
“Peace and quiet” is a soothing binomial expression.
binomial pair
“Give and take” is a well-balanced binomial pair.
binomial idiom
Students learn many binomial idioms in English class.
2項表現（binomials）
2項表現
例文
black and white
The issue is not just black and white.
trial and error
He learned how to fix the car by trial and error.
give and take
A good friendship needs give and take.
peace and quiet
I need some peace and quiet after a long day.
英語ストーリー（english story）
Title: Learning with Binomials
Emma was preparing for her English test. She had to remember many expressions, especially binomials like “give and take”, “trial and error”, and “peace and quiet.” Her teacher explained that binomial expressions are phrases made of two words joined by “and” or “or.”
Emma thought they were fun to learn. One day, she used “black and white” in her writing. Her teacher praised her and said, “You are using common binomial phrases very well!”
At home, Emma told her brother, “Studying English is not just about learning simple words. You have to know phrases like ‘more or less’ too.”
Her brother asked, “Is that an idiom or a binomial?” Emma smiled. “Both! It’s a binomial idiom, and it helps you sound more natural.”
Emma believed that through trial and error, and a little give and take with her studies, she could become fluent. And after studying hard all week, she finally enjoyed some peace and quiet on Saturday.
和訳
タイトル：2項表現で学ぼう
エマは英語のテストに向けて勉強していました。特に「give and take」「trial and error」「peace and quiet」のような**2項表現（binomial）**を覚える必要がありました。先生は、「binomial expression」とは「and」や「or」でつながれた2つの語でできたフレーズだと説明しました。
エマは、それらを学ぶのが楽しいと思いました。ある日、彼女は「black and white」という表現を作文に使いました。先生はそれをほめて、「とても自然なbinomial表現が使えていますね」と言いました。
家に帰って、エマは弟に言いました。「英語の勉強って、単語だけじゃなくて、『more or less』みたいなフレーズも覚えなきゃいけないの。」
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