To opine is to say what you think — to give your opinion out loud or in writing. Newspapers and formal writers like it: “The minister opined that the rule was unclear.” It sounds dressed-up, a little old, and sometimes a little pleased with itself.

To opine is to say what you thinkTo opine就是說出你怎麼想 to give your opinion out loud or in writing大聲或用寫的表達你的意見 Newspapers and formal writers like it報紙和正式的作者很愛用它 "The minister opined that the rule was unclear."「部長opined這條規則不清楚。」 It sounds dressed-up, a little old它聽起來打扮過、有點老派 and sometimes a little pleased with itself有時候還帶點自鳴得意

Friends at lunch do not opine; they just say what they think. Teachers and columnists use it when they want “give an opinion” to feel one step more official.

Friends at lunch do not opine朋友吃午餐的時候不會opine they just say what they think他們就只是說出自己怎麼想 Teachers and columnists use it老師和專欄作家會用它 when they want "give an opinion"當他們想讓「發表意見」 to feel one step more official感覺更正式一點的時候

Though actually, there is a rare science sense too: chemists call certain plant-related compounds opines, from an old Greek word for plant juice. Almost no learner will meet that sense outside a specialist paper.

Though actually不過其實 there is a rare science sense too還有一個少見的科學意義 chemists call certain plant-related compounds opines化學家把某些跟植物有關的化合物叫做opines from an old Greek word for plant juice這個字源自一個古希臘文裡表示植物汁液的字 Almost no learner will meet that sense幾乎沒有學習者會遇到這個意思 outside a specialist paper在專業論文之外

For ordinary English, keep the verb, and keep it for formal writing.

For ordinary English在一般英文裡 keep the verb記住這個動詞 and keep it for formal writing並把它留給正式的寫作用