1.This paper studies existing passive Client Puzzle Protocol(CPP) in defending against Resource-Depletion Dos Attack,presents a framework of http classification service in application layer based on active CPP Protocol(CPPWQ) combining the idea of classification service.
文章在研究现有的被动式Client Puzzle协议(CPP)对防御资源耗尽型DoS攻击的基础上,结合分类服务的基本思想,在应用层提出了一个基于主动式CPP协议的HTTP请求分类服务系统模型(CPPWQ)。
2.To sum up, the studies on the Joseph Needham Puzzle mainly focus on the three aspects: (1) whether this puzzle is true or not; (2) how to solve the puzzle; and (3) how to understand the puzzle.
有关这方面的研究归纳起来主要有三个方面：(1)对难题本身的真伪性讨论；(2)对难题的解答；(3)对难题意义的认识。
3.Black called it "a puzzle of dividends" in 1976, and he remarked, "When we made more attempts to study it, it is more like a puzzle."
费雪·布莱克在1976年称这为“股利之谜”，并说：“我们越是努力研究它，它就越像一个谜。”
4.The puzzle of the cosmic age is a long-standing key problem in big bang cosmology. This paper reviews the origin,history and recent status of the age puzzle,with particular emphasis on the role of the measured value of the Hubble constant in the cosmic age problem.
宇宙年龄是大爆炸宇宙学中的一个关键性的问题．文章对这问题的缘由、历史以及现状作了阐明．重点讨论了哈勃常数的实测值大小在宇宙年龄问题中的核心作用
5.57 Most puzzle fans do not do them for their educational value, and most experts doubt that puzzle teach anything.
大部分字谜爱好者不是为了教育目的做纵横字谜，而且多数专家怀疑玩字谜学不到什么东西。
6.A difficult puzzle.
难解的谜语
7.As always at this time of the season, we should be in for a fascinating few weeks as the missing pieces in the 2007 driver puzzle gradually fall into place.
像以往赛季的这个时间一样，我们应该会着迷地花上几周把2007年的车手之谜一一解出.
8.The design is novelty and breaks through traditional puzzle structure.
设计新颖，打破传统拼图结构。
9.Nevertheless, it is still a puzzle why such a glaring anomaly has not been arbitraged away.
不过，人们仍然疑惑为什么人人可辨的市场超常没有被套利呢。
10.But still the puzzle remained incomplete.
但是谜底还尚未揭开。
