我有一个朋友持完全相反的观点,他认为战争是不道德的。

I have a friend who has the opposing view and felt that the war was immoral.

《柯林斯英汉双解大词典》

我有一个朋友，他的做法正好相反。

I have one friend who does the exact opposite.

youdao

“我有一个朋友，”他说。

"I have a friend," he said.

youdao

Having said that, funny I was talking to somebody the other day who works for the Academy of American Poets.

有一天很巧，我遇到了一个朋友,她在美国诗人协会工作。

普林斯顿公开课 - 人性课程节选

And even more scary than that, a friend of mine is married, and his wife was walking to church one morning.

更可怕的是，我的一个已经结了婚的朋友，有一天早上当他老婆正往教堂走时，

在上西区 - SpeakingMax英语口语达人

I have a friend who's a social psychologist who told me a story once that really made me very nervous, although she's fine.

我有一个社会心理学家朋友,她曾经给我说过一个故事,让我很紧张，虽然她现在一切都好。

耶鲁公开课 - 心理学导论课程节选