Scientific work is differentiated from art by its necessary connection with the idea of progress.

科学工作不同于艺术在于它与进步的概念有必然联系。

《柯林斯英汉双解大词典》

At initialization time, a device driver allocates a net_device structure and then initializes it with its necessary routines.

在进行初始化时，设备驱动程序会分配一个net _ device结构，然后使用必须的程序对其进行初始化。

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If compliance director finds its necessary, he can hire external professional institute or expert in the name of the company to assist his work.

合规总监认为必要时，可以公司名义聘请外部专业机构或人员协助其工作。

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He used strong language and seemed to say that the United States would fight, if necessary,to defend its claim.

VOA: special.2009.02.19

Fate will permit no apocalypse before its time, before the necessary and painful steps that have to lead up to the Last Judgment.

命运在来之前不会允许人们去启示别人，必须要自己去经历必要而又痛苦的那几步,才能走向最终的审判。

耶鲁公开课 - 弥尔顿课程节选

In order to complete the founding of the city, it was necessary to establish its gods and ensure proper respect for the law. Numa was the bringer of the Roman legal codes respecting religion, proper observances and the like.

为了完成重建城市的任务，建立起它的众神体制并且保证人们对于法律的,恰当尊重是必要的，Numa是为罗马带来,法典的人，这种法典崇尚宗教，适宜的规范，诸如此类。

耶鲁公开课 - 政治哲学导论课程节选

And, with that, the Enlightenment will have reached its necessary end.

CENTERFORSECURITYPOLICY: David Yerushalmi on the Geert Wilders Trial

Although "apartheid" is now a familiar term in much of the world, a few brief details of its history seem necessary to explain its grotesque impact on the life of Ruth Khumalo as well as on her children and their children, including the boy.

NPR: One Boy's Heroism in the Face of AIDS

So, for the recovery to take hold its not necessary that workers salaries go up or even that an increasing fraction of national income go to workers.

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