流行音乐并不一定是劣质的东西，它可以是艺术。

Pop music doesn't have to be trash; it can be art.

《柯林斯英汉双解大词典》

长寿并不一定是指年长的时间更长。

Longevity is not necessarily about being older for longer.

youdao

在学校交朋友可能有点棘手——但它并不一定是这样的！

Making friends at school can be a little tricky—but it doesn't have to be!

youdao

They needn't be thought of as vulgar prejudices, one of which is in fact the "prejudice against prejudice."

它们并不一定是粗俗的偏见，这是对偏见的偏见“

耶鲁公开课 - 文学理论导论课程节选

Now I could have made a key, keys don't have to be strings, but as it happened, I didn't.

现在我可以建立一个键了，键并不一定是字符串，但这儿既然已经是字符串了。

麻省理工公开课 - 计算机科学及编程导论课程节选

Now when I take it seriously, there is a problem here because sometimes research doesn't deliver good news.

但当我认真对待这事，就出现了一个问题,有时研究所得并不一定是好消息。

哈佛公开课 - 幸福课课程节选