定义明确的

First of all, based on the aid of AIS (Automatic Identification System), which can give us the target ship's accurate data and will implement in 2002, we study own ship's relative motion to target vessels, define DCPA and its sign, give mathematic model of collision avoidance, produce the optimal opportunity and action taking of collision avoidance, and obtain a graph of action-taking.

论文首先在2002年将要开始实施的船舶自动识别系统所能提供的准确目标船信息的基础上，研究本船相对于目标船的运动，定义DCPA的大小和符号，推导出船舶避碰数学模型，给出船舶最佳避让行动与时机，得出避让行动曲线图，并且明确最佳避让行动时机不是某个点，而是一个时间段。

From a detractor's viewpoint, the numerous modeling concepts,poorly defined semantics, and lightweight extension mechanisms that UML provides make learning and applying it in an MDD environment difficult.

从反对派的观点，众多的建模概念，定义不明确的语义，以及轻量级UML的扩展机制，使学习和提供在MDD的应用环境，很难。

But as money market funds, Eurodollar CDs, repurchase agreements and other instruments started to gain popularity, it became much more difficult to define money.

在消费者和企业都把钱存在储蓄账户或支票帐户中的时代，货币的概念是明确的；但随着货币市场基金、欧洲美元存单、回购协议以及其他金融工具越来越流行，定义货币的难度大为增加。

Paul Meyer who is considered by many to be the founder of today's personal development industry.

这一步的关键在于明确定义你的任务及相对应的完成期限。写下你的目标及期限，等于告诉自己究竟要去哪里。

Yet Wang Guangle has his own approach to painting. In his works like the Terrazzo series, Wang did not offer any definitive meaning or even content to the viewers, instead, the objects in these paintings are represented as the form.

但是王光乐的绘画却从另一个角度出发，像"水磨石"系列并没有明确的意义、内容的指向，而是仅仅将对象赋予一种形式，很难从具象或是抽象的角度来定义。

In his works like the Terrazzo series, Wang did not offer any definitive meaning or even content to the viewers, instead, the objects in these paintings are represented as the form itself, making it hard to define the works as "abstract" or "figurative".

但是王光乐的绘画却从另一个角度出发，像"水磨石"系列并没有明确的意义、内容的指向，而是仅仅将对象赋予一种形式，很难从具象或是抽象的角度来定义。

Yet Wang Guangle has his own approach to painting. In his works like the Terrazzo series, Wang did not offer any definitive meaning or even content to the viewers, instead, the objects in these paintings are represented as the form itself, making it hard to define the works as "abstract" or "figurative".

但是王光乐的绘画却从另一个角度出发，像"水磨石"系列并没有明确的意义、内容的指向，而是仅仅将对象赋予一种形式，很难从具象或是抽象的角度来定义。

The first practical step towards effective control of stray dog populations is to identify what is meant by the term "stray" and must clearly differentiate between owned and unowned animals, and deal with each appropriately.

通向有效力的流浪狗控制操作的第一步是给"流浪"下定义，并且有主人和无主人的动物必须被明确的区别开来，分别对待。

Some thinkers, for instance, have argued that the difference between fine art and applied art has more to do with the actual function of the object than any clear definitional difference.

有些思想家，例如，认为之间的差异美术和应用艺术更多的是与实际功能的对象比任何明确的定义不同。

The question is a provocative one, but ultimately not very meaningful; the concept of the transhuman is too vague for there to be a definite answer.

这是一个具有争议性的问题，但最终没有多大的意义；&过渡人&的定义过于模糊而难以给出一个明确的答案。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。