未必的英文：
may not
not necessarily

参考例句：

All are not hunters that Blow the horn
吹号角的未必都是猎人

Learned men are not necessarily wise.
博学者未必都是聪明的。

Don't knock it! You won't be able to find another job that pays so well.
别挑三拣四了！你未必可以找到另外一个待遇这么好的工作！

Life is short, the art long, opportunity fleeting, experience treacherous, and judgment difficult. --Hippocrates
生命短促，艺术长久，机会稍纵即逝，经验未必可靠，判断困难。——希波克拉底

Most likely their gatekeepers would refuse to announce us. Why ask for a slap on the face?
"先不先,他们那些门上的人也未必肯去通信.没的去打嘴现世"

Clouds do not necessarily forecast rain.
云层未必预示下雨。

Not expected to succeed
未必会成功的

Stress in itself is not necessarily injurious.
压力本身未必有害。

It seems unlikely that they'll come.
他们似乎未必会来。

Cheerfulness does not always imply happiness.
快乐未必意味着幸福。

may是什么意思：
modal v. 也许，可能；可以；会；能够；但愿
n. 山楂属植物；（May）五月

international mai
国际邮政

There may be an announcement about this tomorrow or not,as the case may be.
这件事明天可能有个声明，也可能没有，那要看情况了。

On May Day a pretty girl is chosen the May Queen.
在五月节那一天一位漂亮的少女会被选为五月皇后。

May good fortune attend you!
祝你鸿运当头！

You may go on with your concert.
你可以继续开音乐会。

necessarily是什么意思：
adv. 必然；必定

The converse is not necessarily true.
反过来就不一定正确。

Asian values are not necessarily authoritarian.
亚洲价值观并不一定是权力主义的。

Yet that is not necessarily a reason for cynicism.
但这不足以成为犬儒主义的借口。

Stress in itself is not necessarily injurious.
压力本身未必有害。

A conflict or a frustration is not necessarily pathogenic
一个冲突或者阻挠不一定会产生心理变态。