Monogamy is a possibility - and a necessity.

一夫一妻制不仅是可能的，而且是必要的。

youdao

Monogamy is a possibility - and a necessity. Kids have got to have something they can rely on. You have got to have something you rely on.

一夫一妻制不仅是可能的，而且是必要的。孩子们必须有所依靠；你也必须有所依靠。

youdao

This is, of necessity , a brief and incomplete account.

这必然是一份简略的、不完全的描述。

《牛津词典》

"I am convinced, from my conversations with General Stanley McChrystal and I'm grateful to him for the time he gave me there and even on the telephone since he understands the necessity of conducting a smart counterinsurgency in a limited geographic area,".

VOA: standard.2009.10.26

Leda and the Swan" seems to say a knowledge of the body, of the necessity of embodiment. In the late Yeats, in the poems that I'll be discussing today, there's no knowledge apart from the body.

这诗里似乎说的是身体的知识，表现的必要性，我们要谈论的,叶芝的晚期诗讲的就是身体。

耶鲁公开课 - 现代诗歌课程节选

The question of censorship and the telling of lies is introduced, in other words, as a question of military necessity, controlling the guards or the auxiliaries of the city, its warrior class.

审查的问题,及说谎的导入，换句话说，就像军备的问题，控制守卫人员,或说是城市的后备，战士阶级。

耶鲁公开课 - 政治哲学导论课程节选

It should be in stores Jan. 22nd, but some time around Jan. 20th we'll more than likely be getting the first reports of huge supply shortages, and on Jan. 23rd we expect they'll be all sold out this is going to be a huge seller to Mac first-timers, and a necessity to Mac vets who want a second box in the den.

ENGADGET: The Apple Mac mini

And he was basically a, kind of, shy, introverted guy, but he, you know, and there was a necessity to be out there, to be a performer and to be extroverted.

NPR: 'On the Road' at 50

Internet and mobile phones are a necessity, and finding oneself offline even for a couple of hours can make everything a bit uneasy, and me a bit queasy.

FORBES: Affordable Communications: Finestrella At The Forefront