Good relations between Hawaii and the United States were necessary to keep the port open to American ships.

VOA: special.2010.07.08

Or just have the good intentions without the effort that's necessary to bring about a positive exponential function.

还是只有好的意图但不付出,必要的努力发挥正面指数函数的作用。

哈佛公开课 - 幸福课课程节选

Well, chocolate--The good tastiness of chocolate isn't some necessary fact about the world.

嗯，巧克力，巧克力好吃,不是宇宙中的必要事实。

耶鲁公开课 - 心理学导论课程节选

The law established the idea that the government could control industries, when necessary,for the public good.

VOA: special.2010.05.06

Why? Because good will and idealism, while necessary,they are not sufficient.

为什么呢？因为美好的意愿和理想主义，虽然必要，但却是不够的。

哈佛公开课 - 幸福课课程节选

So, you send it off to a middleman who does the turning of the grapes and the olives into the liquids that are necessary, and he takes a good bit of the profit.

你可能会将它们卖给中间商,他们知道如何将葡萄和橄榄榨成液体,然后从中收取可观的利润

耶鲁公开课 - 古希腊历史简介课程节选

We've extrapolated that people have property rights and so whether or not it would be a good thing or a nice thing or even a necessary thing for the survival of some people, we don't see that that justifies the violation of the right that we've logically extrapolated.

我们已经推出人们有财产权,所以，就算是为了做好事，做善事,甚至是为了让某些人活下去而必须做的事，那也是不能证明，侵犯这些推定的权利,就是正当的。

耶鲁公开课 - 公正课程节选