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A relational database can be viewed as a directed graph constructed by tuples and foreign key references.

关系数据库可以看作是元组以及外键关系构成的有向图。

Here's the key point: It's much easier now for the racquet and the hitting hand to stay on line and directed towards the target, that's because you're swinging inside out away from your body.

重点在这里：现在网拍和打击的手停留在朝目标的线上并指向目标就容易多了，那是因为你正在内外挥拍远离你的身体。

The main task of this article contains:compares algorithm and encryption and decryption between the widely-used public key encryption system RSA and ECC;(2) directing against present elliptic curve attack algorithm, uses SEA algorithm to perform choosing of safe elliptic curve and to achieve based on prime field elliptic curve"s ELGamal encryption and decryption and digital signature;(3) discusses elliptic curve"s application on smart card and proposes two identification plans based on EEC.

2针对目前已有的椭圆曲线攻击算法，使用SEA算法实现了安全椭圆曲线的选取，实现了基于大素数域上的椭圆曲线的ELGamal加解密和数字签名。(3)讨论了椭圆曲线在智能卡上的应用，并提出了两种基于ECC的身份认证方案。

Digital watermark is a key research direction of information hiding technology.

数字水印是信息隐藏技术的一个重要研究方向。

Especially concerning the direction and key aspects of infrastructure development in China in the days to come.

同时，这一部分还对作为发展中大国的中国今后基础设施发展的方向和重点提出了自己的政策建议。

The comprehensive evaluation of energy utilization is a key research direction for weighing effective use of energy.

能源利用的综合评价是衡量能源是否有效利用的重要研究方向。

Finally, the research direction and key problem to be solved are also discussed for Neural Network controller.

最后讨论了神经网络控制器发展方向与亟待解决的问题。

If there is second level menu then you can choose the function by direction key too.

如果某功能选项还有第二级菜单，您可以继续选择您想要的功能。

As a new administrative regulation, environmental executive direction plays key role in environmental protection.

环境行政指导作为一种新型的环境行政管理手段，在我国的环境保护中发挥着积极作用。

Meanwhile,to realize a coordinated development between the environment and economy has become a key research direction on issues of trade and environment.

而实现环境与经济贸易的协调发展成为贸易与环境问题中的重要研究方向。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48