I clearly realize that professional knowledge is necessary if I want to get a good job.

我清楚地意识到如果我想要一份好的工作，专业知识是必要的。

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It is always a good idea to keep a lot of necessary supplies in the home even before winter begins.

VOA: special.2010.01.05

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

Not so Thatcher: to her it was and is a necessary good.

FORBES: Margaret Thatcher Exposed The Infantile Illusions Of Socialism

Rare are the days I can put together the solid four hour chunk of time proven necessary to get good, deep work done.

FORBES: Why Benjamin Franklin Was More Productive Than I Am

Dana Goldstein responds by noting that small classes are not necessary aligned with good results, but American parents still want small class sizes.

FORBES: Class Size and the Education Experience