This paper first gives out definition of receipt-freeness, and prove necessary and sufficient condition of receipt-freeness.
给出无收据性的定义，并证明满足无收据性的充分必要条件。
The deepening economic gloom may well mean that it will eventually prove necessary to cut interest rates to arrest a sharper downturn.
逐渐加强的经济衰退迹象也许终将证明降低利率以抑制经济衰退是必要的手段。
A well-defined and communicated grid system results in designs that can be modified and extended, allowing developers to make appropriate layout decisions should alterations prove necessary.
在精心定义的网格系统下进行设计，可以方便地扩展和修改，从而帮助开发者在各种候选方案中选择出具有最合适布局的方案。
We shall prove ourselves once again able to defend our island home, to ride out the storm of war, and to outlive the menace of tyranny, if necessary for years, if necessary alone.
我们要再次证明我们能够保卫我们的岛国，使其逃离战争风暴，并能够在压迫统治下永久的生存，即使需要许多年，即使需要孤军奋战。
He worries that Americans, long used to instant financial gratification, have borrowed so heavily from the future that the necessary belt-tightening will prove to be beyond them.
他担心，过去长期习惯很快获得金融借贷满足的美国人超过未来的预定如此严重，以致将证明必要的强制性节约会远不适用美国人。
It is necessary to reaffirm that these peoples exist, so we support the use of images that prove these facts.
重新确认这些人还存在很重要，所以我们支持用这些图片证明他们存在的事实。这些人，他们最基本的权力，特别是他们的生存权，被忽视了。
However, all the scientists agree that more data is necessary to prove that radon levels in water are associated with the possible birth of an earthquake.
不过，所有的科学家都一致认为，需要更多的资料才能证明水中氡的含量和可能发生的地震有关。
A determined minority, however, wants to block it, and finding the time for the necessary procedure may prove difficult.
但是，少部分人坚决想要阻止它，但是找到另一个时机来完成这必要的进程可能会很难。
Later, when “intellectual” was introduced, it seemed necessary to write to prove themselves “knowledgeable, ” which made them churn out books and import a new style of writing—“book review.”
后来引进了知识分子的称谓，似乎不写书便不足以证明其“知识”，于是开始大量写书，并连带着从外国引入了“书评”这一新的言说形式。
SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
如本程序被证明有瑕疵，您应承担所有服务、修复或改正的费用。
If an airline wishes to start a new route within or to the country, it has to prove that it has the equipment and people necessary for operating the service.
如果一家航空公司想要在国内或到这个国家来开辟一条新航线，它必须证明它有相应的设备和必需的人员来经营这项服务。
The author compares the death penalty and life imprisonment to prove that the death penalty for the individual prevention is entirely necessary.
笔者通过对死刑和终身监禁的比较，认为死刑对于个别预防是完全必要的。
Then show that you have the ability to be successful by giving evidence of how your interests, qualifications or experience prove that you have the necessary skills.
然后说明你具有成功的能力，通过证明你的兴趣、资格或者经历使你具备了必需的技能。
Next, this paper discusses the three aspects of the creative function to effectively prove the Industrial Design is an absultly necessary means to creat a choice product.
本文论述了工业设计的三个创造作用，有力地证明了工业设计是创造优良产品必不可少的手段。
In order to be sure of world events and important changes, it is necessary to go back at least 1000 years and prove up the cycles.
为了确定世界性的事件和重大转变，有必要追溯到至少1000年前去勘探那些循环。
Batu was called upon to prove consistency in delivering performance that will cut it out as a blue chip, in order for it to create the necessary market for shareholders.
为了使英美烟草乌干达公司为股东创造必要的市场，英美烟草乌干达公司被要求证明自己能连续发布使自己作为蓝筹股的业绩。
Some people think that it is necessary for them to have oral test so that they can have a certification to prove themselves.
一些人认为口语考试很重要，因为他们可以得到一个证书来证明自己的口语能力。
I analyze the situation now in the school and the power to growing in the future, pose the suggestion to produce a information system to manage the machine and prove that is feasible and necessary.
文中首先对学校设备管理的现状及其重要性进行了分析，提出实现学校设备管理信息系统的必要性与可行性。
They hope that by May Iran can provide the organization with evidence necessary to prove the accusations false.
她希望伊朗在五月份向该机构提供必要的证明，以对有关指控进行澄清。
Objective, actual, accurate, timely and complete medical record materials are powerful proofs to prove whether medical behavior is legal, proper, necessary and safe.
客观、真实、准确、及时、完整记载的病历资料是证明医疗行为是否合法、适当、必要、安全的强有力的证据资料。
In the paper, we prove a graph which satisfies the Fan's condition is upper embeddable by a sufficient and necessary condition on non-upper embeddable graphs.
文章利用关于不是上可嵌入图的充要条件，证明了范条件图是上可嵌入的。
Results of calculation prove that the solution is very stable and it is not necessary to modify the mesh near sonic line or other places.
计算结果表明解相当稳定并且不需要在音速线附近等处加密网格或作其他处理。
For the purpose of allowing time to process items, prove balances and make the necessary entries on its books to determine its position for the day this Bank has fixed a cut-off hour.
为保证有足够的时间处理项目，核对差额和登记必要的账目，本银行确定了一个截止时刻。
This paper puts forward the theorem dealing with the necessary and sufficient condition of the regular solution to the rational interpolation. The theorem is simple to prove and convenient to use.
本文给出了关于有理插值正则解的充要条件的一个定理，其证明是简单的，作为判别法则使用亦是方便的。
In this paper, we prove a sufficent and necessary condition of existence for the solution of a kind of sublinear singular bound ary value problem.
证明了一类含脉冲次线性奇异边值问题解存在的充要性条件，推广了以前的相应结果。
Conclusion Systemic comprehensive research and the evidence based medicine research of the field are necessary to im-prove the therapeutic effect of glioma.
结论提高脑胶质瘤临床治疗效果需要系统综合治疗研究，加强该领域的系统研究包括循证医学的研究很有必要。
In a thorough treatment of the real-number system, it would be necessary at this stage to prove certain theorems about integers.
在实数系统中，为了周密性，在实数系统中，为了周密性，此时有必要证明一些整数的定理。
It is necessary to prove that the appearance of the product has the function of indicating the trade source of the product, rather than just being a property of the product itself.
但是需要证明产品的外观具有表明产品商业来源的功能，而不是产品自身的特性。
It is necessary to prove that the appearance of the product has the function of indicating the trade source of the product, rather than just being a property of the product itself.
但是需要证明产品的外观具有表明产品商业来源的功能，而不是产品自身的特性。
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