"There are a host of efficiencies that can be gained without increasing our personnel or our budget, but rather decreasing the amount of money that's spent on unnecessary things in order to fund some of the critical initiatives that we've all talked about,"

VOA: standard.2009.04.20

Galileo appears in the simile but actually seems to be unnecessary for the general purposes of the comparison.

伽利略在这个明喻中出现了，但明显他对于,这个对比的整体目的来讲是可有可无的。

耶鲁公开课 - 弥尔顿课程节选

which was so nice and so unnecessary, but she's wonderful.

真的很好，虽然没必要，但她真是太好了。

就业的方法 - SpeakingMax英语口语达人

When you're all out of specific cases and you want to handle everything else, you literally say "default:" And here I could end the program with break, but it's kind of unnecessary because once I'm at the bottom of the curly braces, that's it.

当它不在你列出的所有情况中,为了处理其他的情况，你可以用“default：“,这里我可以用break来终止这段代码，但是它是有点,不必要的，因为我已经在这个花括号的,底部了，就这样了。

哈佛公开课 - 计算机科学课程节选