It is mainly about the types, the people involved in the benefits and the existence time.

该部分主要介绍了财产保险利益的类型、利益担当人及存在时间。

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Coverage issue not only decides whether a WSN can work effectively or not, but also comes to a decision on function, existence time of the network to a large extent, which is a basic issue in the WSN.

覆盖问题不仅决定着一个无线传感器网络能否正常有效地工作，而且在很大程度上决定了网络的性能、生存时间等，是无线传感器网络的一个基本问题。

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Insurable interest in property and in life insurance should be provided separately, because their people involved and existence time are different.

对于财产保险中的保险利益和人身保险中的保险利益应当分别加以规定，因为其利益担当人和存在时间是不同的。

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He tested the free-diving self-propelled submersible - one of only two in existence at the time - on increasingly deep dives off the California coast.

VOA: standard.2010.06.21

So the problem of existence through time,or persistence through time, shouldn't be called the problem of personal identity,but just the problem of identity.

所以积年累月下来存在的问题，就不该叫做个人认同感的问题，而仅是认同感的问题。

耶鲁公开课 - 死亡课程节选

What gives it its identity and ? enduring existence over time?

什么赋予它身分,且历经时间的考验？

耶鲁公开课 - 政治哲学导论课程节选

The most obvious one to adopt appears to be the user authentication and OTP (one-time-password) that has been in existence for some time and has seen a fair degree of success in preventing fraud.

FORBES: How much should you trust your mobile phone?

Clark 's will, which has been in existence for some time, and knows nothing about its contents.

MSN: Investigative reporter

Apomorphine has been in existence for some time and was originally injected into patients with Parkinson's Disease - a condition which affects coordination.

BBC: Parkinson's Disease drug 'cures impotence'