今天，几乎每个人都有一个智能电话，电话亭已经过时了，似乎是无用的。

Today almost everyone has a smart phone, booths are out of date and seem to be useless.

youdao

喋喋不休地谈这些琐碎细节是无用的。

It's useless to fire away with such trivial details.

《新英汉大辞典》

如果一个程序是无用的，那它必须被注释。

If a program is useless, it will have to be documented.

youdao

He had the feeling that everything he saw was a broken-off piece of some giant blank thing he had forgotten had happened to him.

他有种感觉,觉得他看见的一切都是之前发生过的,他已经忘记的,某件大而无用的事掉落的碎片。

耶鲁公开课 - 1945年后的美国小说课程节选

Now as an aside, I'll admit this is a completely useless program, much like the first couple of ones we did because why would you write a program just to solve this?

说点题外话，我承认这是一个完全无用的程序，跟我们之前写的两个程序一样,我们为什么需要写个程序来解决这个数学运算呢？

哈佛公开课 - 计算机科学课程节选

Inutile loveliness" is kind of the key word of Nabokov's technique, and he says the novel has as its only purpose to provide aesthetic bliss. So, here is inutile loveliness coming just from seeing the landscape as a stranger.

无用的可爱“是纳博科夫技巧的一个,关键词，他说小说只有一个目的，那就是提供,美学狂喜，所以这里的“无用的可爱“,是把风景当做一个陌生人看待。

耶鲁公开课 - 1945年后的美国小说课程节选