这些不一定是心怀怨恨、有恶意的人。

These are not necessarily hateful, malicious people.

《柯林斯英汉双解大词典》

最大的不一定是最好的。

Biggest doesn't necessarily mean best.

《牛津词典》

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》

Now,notice that does not necessarily mean it's canonical because scripture in some religions refers to a bunch of stuff.

要记住它不一定是正典,因为圣典在某些宗教里涉及很多东西。

耶鲁公开课 - 新约课程节选

Well, not everybody, but everybody can use to keep emails safe, just like sort of a really easy thing to do.

嗯，不一定是所有人，但是每个人都可以轻而易举地用这种密码来保证自己邮箱的安全，

积极参与俱乐部活动 - SpeakingMax英语口语达人

Yeats spoke of the poem as a mad song, maybe not a kind of mad song we would--it's not what we would think of as a mad song, necessarily.

叶芝说这是首狂诗歌，也许不是我们所讲的狂诗歌,不一定是我们所认为的狂诗歌。

耶鲁公开课 - 现代诗歌课程节选