在我们了解到底有多少非法移民的孩子的出生是由于对美国公民地位的保证之前，广泛的研究是十分必要的。
Extensive studies would be necessary before one could know how many of the children of illegal immigrants were born here because of the guarantee of American citizenship.
无论这是不是一种真正的危险，看看发生了并且真相意味着什么，对人类的好奇心仍然是有必要的，只是有些增人烦恼。
Whether or not this is a real danger, it still behooves human curiosity to see what is going on and represent truths, however disturbing.
为了使NMS适应不同组织对各种业务的需求，定制自动化工作流是有必要的。
Custom automated workflows are essential for adapting an NMS to the varying business requirements of different organizations.
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