查询词典 difficult to ascertain

So it is very important for oblige to ascertain whether the copyright is reversible or not in the contract.

事物在一个变化的过程中，不但物质系统的本身发生了变化，而且系统的外界环境也会相应的变化。

I am going to ascertain the truth.

我准备去弄清楚真相。

Take the time to correctly ascertain your own needs and the needs of any site you'll be building.

采取的时间要正确确定自己的需求和需要的任何网站，您的建设。

Do you think you can ascertain prospect of selling such product ?

您认为您能够确定这种产品的销售前景吗？

You should begin to ascertain the pattern and your own weaknesses.

你应该开始确定规律和你自己的弱点。

On this world, we need to want to ascertain self location , must adopt a reference.

在这个世界上，我们要想确定自己的位置，必须采取参照物。

Results of this study suggest:1 There are 7 parts in the Presentation Development: Ensure the aim, Collect the Dimensions, Make the topic, Ascertain the criterion, Confirm the code method, Make the Assessor Training Manual, Make the Project Manager Manual.2 The Presentation Test have a good reliability, but the validity is not satisfied using the self-evaluation as a criterion.3 Some kinds of difference in the assessor and assessee themselves will influence the final result.

本研究着眼于即席演讲法这种情境模拟的测评方法，通过系统的理论研究构建一个较为完善并具有较强操作性的应用模式，同时，通过实证研究进一步探讨即席演讲测评工具的信度、效度以及测评对象和测评者本身的因素对测评结果的影响，希望能在理论建设上丰富国内外对于评价中心和情境模拟测评的研究资源，从实际应用上进一步提升我国人事测评的方法，为我国企事业组织人事管理水平的提高贡献一份力量。

The purpose of the study was to ascertain the optimum concn. of potassium sorbate as bacteriostatic agent in open tissue culture.

［目的］确定山梨酸钾作为开放式组织培养抑菌剂的最佳浓度。

As an important principle, it should be explicit about its legal requirement and its relationship with similar legal system in its application in our country, so as to ascertain its legal effect.

作为一项重要原则，其在我国适用中应明确其适用法律要件，辨析其与周边法律制度之关系，从而最终确定其适用的法律效果。

The main research results in this dissertation can be given as following:Firstly, the bidding strategies and affections of generation companies on the TOU power price are analyzed; Supply function model is employed to simulate the bidding strategies of generation companies in power pool. Some meaningful results are obtained through the proposed equilibrium equations model, when different bidding parameters are selected to maximize profit of suppliers, such as the the numeral of generation company, the block bidding, and power demand elasticity. Based on these results, the affections between the bidding strategies and the TOU power price are discussed.Secondly, the important principles consider the factor of bidding strategies of generation companies and consumers gaming strategies are proposed to constitute the new TOU power price model under present electricity market. Based on these pricinples a new mathematical model of TOU power price is constructed, to evade electricity market risk, partition the peak-valley, ascertain the consumers' response curve, and protect the ambilateral profits.Thirdly, the affections of the TOU power price strategies for reducing the network loss, adjusting node voltage, improving load curve of power system, and protecting the consumers' benefits in electricity market are analyzed with applications of a city real time load data of Jiangsu province.

针对"厂网分开，竞价上网"的电力市场运营模式，本文主要完成了以下研究工作：1研究了发电商不同的竞价上网策略，利用供给函数均衡方法，建立了发电商的竞价上网策略模型，给出了市场均衡解的具体解法；讨论了不同条件下发电商的竞价策略对市场的影响，并获得了发电商的最优上网竞价策略，明确了竞价上网与峰谷分时电价之间的影响因素；利用电力系统负荷曲线，建立了发电商最优竞价策略与峰谷分时电价之间的相互联系，通过仿真算例分析了峰谷分时电价与发电商最优报价之间的相互影响。2提出了"厂网分开，竞价上网"电力市场模式下，考虑发电侧竞价和用户侧博弈等风险因素影响，峰谷分时电价理论建模在规避电网企业运营风险，保护供电方与用户双方的利益、确定用户响应曲线、划分峰谷时段、设置合理的电价拉开比等方面所应遵循的基本原则，在此基础上建立了适合电力市场模式的峰谷分时电价模型。3从原理上分析了需求侧实行峰谷分时电价策略，对削峰填谷，提高负荷率，改善负荷曲线形状，降低电力系统的电能损耗和电压损耗等方面的影响，并进行了仿真验证。

A historical region of southwest France between the Pyrenees and the Garonne River. The duchy of Aquitaine was joined with France after the marriage of Eleanor of Aquitaine to King Louis VII in1137, but its possession was disputed after her subsequent marriage to Henry II of England.

阿基坦法国西南部一个历史地区，位于比利牛斯山和加隆河之间，在1137年阿基坦的埃莉诺与国王路易斯七世结婚之后阿基坦公国加入法国，但当她再嫁英国亨利二世后，其归属权便受到争议

There are moments when I look at the smiling , happy faces of my expectant staff and wonder how they will cope when confronted by an outraged housemaster along with an unrepentant and recalcitrant bleached blond teenager in 18 years ' time .

有时候，我看着那些满怀期待的员工微笑，幸福的脸，想着当他们遇到一位愤怒的宿舍管理员和一位不知悔改，叛逆，而且将头发染成白色的18岁少年时，他们会如何处理。