四个

Researchers from the University of York and Hull University in Yorkshire had 45 osteoarthritis sufferers over age 50 wear four types of bracelets (copper, a weak magnet, a stronger magnet and a demagnetized strip) for four weeks each.

来自英国约克郡约克大学与赫尔大学的研究人员，让45位年龄在50岁以上的骨关节炎患者佩戴了四种类型的手镯（分别用铜、弱磁材料、磁力较强材料和去磁材料制成），每一种佩戴四个星期。

Firstly, there are less secure and efficient threshold schemes; secondly, the research on multi-secret sharing is rather weak; thirdly, usual verifiable secret sharing don't consider the partners' anonymity, while it is just people's expectation. Last but not least, the problem of variety on shares is becoming a more obvious restrict of efficiency, especially in the facets of the lost and being districted of shares. On the application of verifiable secret sharing, there are also two inadequates : on the one hand , verifiable secret sharing has been used in much threshold cryptography but in less verifiable signatures.

然而，经过认真总结、分析该领域目前研究的发展状况（具体结果将在第一章给出），我们发现在可验证秘密分享的研究方面，仍有下列四个不足之处：一是现有的安全、高效的门限方案不多；二是对多秘密分享的研究非常薄弱，在已有的文献中还见不到安全、实用的可验证多秘密分享方案；三是通常的秘密分享方案没有考虑秘密分享者的匿名性，而这恰恰是人们所希望的；四是秘密分享者的动态管理问题已经越来越明显的制约现有方案的安全，尤其是密钥份额丢失或被破坏时如何恢复更是没有被深入探讨。

The second was at seventy-five and the third and fourth were down in blue water at one hundred and on hundred and twenty-five fathoms.

第二个在七十五英尺的深处，第三个和第四个分别在蓝色海水中一百英尺和一百二十五英尺的深处。

The second was at seventy-five and the third and fourth were down in the blue water at one hundred and one hundred and twenty-five fathoms.

第二个在七十五英寻的深处，第三个和第四个分别在蓝色海水中一百英寻和一百二十五英寻的深处。

And a survey seems to have cofirmed that, with those interviewed admitting an average four fibs a day- five by men and three by women.

一个调查好像证实了这点，一项被允许的访问显示，平均每天人们要说四个小谎话，男性一般是五个，女性是三个。

Another essential principle which runs through Plotinus\' theory of soul and his whole philosophy is the idea of "the great chain of beings", i.e. the lower being depends on the higher one, the product is lower than and exists in its producer. The top of this chain is the One or the Good, all things come from and also try to return to him. Hence, returning to the One is the ultimate end of soul. And, this ability is deep in all souls. Because soul is a substance which has many different levels and abilities, the One and Intellect are all present in every soul. Each of our soul all has some divinity by which we can ascend to and achieve the ultimate mystic uniting. So, ascending and uniting is actually a process of returning, i.e. returning deeply to soul and self where the divine hypostases are always shining and illuminating.In order to express these main points, in the part of introduction, I will introduce the character of Plotinus\' time and his individual personality, I will present the reason why I choose

为表达上述要旨，本论文将在导言中介绍普罗提诺所处的时代特征及其个人气质，并交待本文的选题缘起及其基本思路；在第一章中，我们将首先探求灵魂一词的基本含义，然后对普罗提诺之前的希腊哲学史中的灵魂理论做一纵向的爬梳，再给出普罗提诺对此的评论和总结；在第二章中，我们将横向地分析普罗提诺对灵魂的诸多界定，包括灵魂的地位、灵魂的本质与力量、灵魂的层次与构成和灵魂的存在状态四个方面；第三章的主旨是灵魂创生世界，包括灵魂必然下降、灵魂与世界、与身体及其与自我之间的关系；第四章要谈到灵魂建构知识的问题，分感知、记忆、推理与理智三小节；第五章的标题是灵魂追求太一，包括存在大链、灵魂的上升之旅、灵魂的自由与幸福三部分；最后我们将以普罗提诺的神秘主义作为本文的结束语。

It is a melancholy object to those who walk through this great town, or travel in the country, when they see the streets, the roads, and cabin doors, crowded with beggars of the female sex, followed by three, four, or six children, all in rags, and importuning every passenger for an alms.

那些穿行于这个大都会或旅行于这个国家的人会看到，成群的女乞丐拥挤在街道上和门槛里向过往行人乞讨。她们后面又跟着三个、四个、或六个衣衫褴褛的孩子。这真是一幅令人伤心的景象。

His climbing partner Richard Connors had climbed the first four pitches on May 20, then fixed lines anddescended. They returned the next day and jugged to the top of the fourth pitch. Due to approaching weather,they then decided to retreat and pull their ropes.

意外发生的前一天（亦即5月20日），Tamin与他的绳伴Richard Connors已经攀登了 Spaceshot 的前四段绳距，留下固定绳后，垂降回到地面。5月21日当天，他们回到这条路线的第四个绳距顶端，但是因为天气的关系，他们决定撤回地面，并且回收所有的装备。

Tamin and his climbing partner Richard Connors had climbed the first four pitches on May 20, then fixed lines and descended. They returned the next day and jugged to the top of the fourth pitch. Due to approaching weather, they then decided to retreat and pull their ropes.

意外发生的前一天（亦即5月20日），Tamin与他的绳伴Richard Connors已经攀登了 Spaceshot 的前四段绳距，留下固定绳后，垂降回到地面。5月21日当天，他们回到这条路线的第四个绳距顶端，但是因为天气的关系，他们决定撤回地面，并且回收所有的装备。

She had headaches - lancinating lightn ing , hot pa in - th at knocked her out for periods rang ing from four hours to four days .

她患上了头疼--那种突如其来的刀割般的火辣辣的疼痛，发作时持续四个小时甚至四天，使她不堪忍受。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。