虫虫殿下
没必要的英文是unnecessary，主要用作形容词，作形容词时译为“没必要，多余的，无用的”。
短语搭配：
Unnecessary Introduction 多此一举的序文。
unnecessary item 不必要的项目。
Unnecessary Items 免带物品。
not unnecessary 不多余。
双语例句：
1、他责备黛安娜没必要那么大惊小怪。
He accused Diana of making an unnecessary fuss.
2、玛丽请不要这样，这完全没必要。
Please Mary, this is all so unnecessary
3、他们认为他的行动没必要。
They viewed his actions as unnecessary.
bigsunsun001
It's unnecessary . It's not necessary .You don't have to (do that ).No need (to do that ).Don't bother.都可以表达没有必要。
兔几小兔几
懂我的人不需要解释，不懂我的人没必要解释No explaination is required for people who know me;No need to give explaination for those who don't know me.
小宇宙88888888
The one who understand me does not need explanation , and It's unnecessary for me to explain to the one who does not know me .
