Problem 1. Lack of essential property files.

问题 1. 缺少必要的属性文件。

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Expressivity is the essential property of design.

表现性是设计的基本属性。

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Motion is the essential property of space and time.

运动是时间和空间的本质。

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And it seems that if we accept the body view, we have to say being a person is not an essential property of being something like me.

似乎如果我们接受了肉体理论，就必须说作为一个人,并不是作为我的基本性质。

耶鲁公开课 - 死亡课程节选

Because it's essential to locke's case that private property can arise even before there is any government.

因为洛克理论中必不可少的一点是说,私有财产在任何政府建立前就已经产生。

耶鲁公开课 - 公正课程节选

Protection of intellectual property rights is essential for businesses to conduct their affairs and government would be negligent if it failed to protect those rights.

WSJ: Is the U.K.'s Love Affair With the Internet at Risk?

As Adam says, this kind of complex property arrangement is essential to making sure that all homeowners in the area have access to essential utility services.

FORBES: Adam Thierer, Infrastructure Socialist

"It is critical for people everywhere to understand that intellectual property protection is essential for companies like ours to continue to develop innovative medicines to treat serious diseases, " Dolan wrote.

FORBES: Plavix Pain