不改变的

According to the understanding of the flow characteristics, a mechanism of formation of vortex streets has been proposed to be the absolute instability of the wake, and several methods of flow control have been developed and shown successful.

根据表面流动及尾流特性的研究结果，从流动稳定性的角度提出了尾流中涡街产生的机理，在于尾流中存在着绝对不稳定的区域。基于对流动特性的理解，从改变流动稳定性的角度，寻求各种流动控制方法。试验结果表明这些方法是成功的。

The designing way of this paper about the forebody and afterbody of aerocraft is based on the wave-rider theory, so design the aerocraft upper and down surface separately, besides keeping the length and thickness of forebody and afterbody constant, to some extent ensure the whole aerocraft design target and avoid the conflict with other disciplines, The flow solver takes use of Euler equations, combining with the technique of the unstructured dynamic meshes.

文中对飞行器前后体设计思路基于高超音速乘波体的思想，将飞行器上下表面进行分离设计，在前后体的长度厚度以及发动机的位置保持不变的条件下，较大程度避免了飞行器整体外形布局的改变，从而一定程度上保证了总体设计的目标，大大缓和了与飞行器其他学科设计时的冲突。

It is concluded by the research that: it is viable to achieve the proposed treatmentobjectives to the alga concentrated feeding water during the peaking summer season,such as, lower turbidity, control of residual aluminum and pH, equivalent performanceof pre-chlorination, only if dosing chlorine dioxide as pre-oxidation algaecide,ploy-aluminum as coagulant, HCA as flocculant, without the needs of modification toexisting water treatment facilities.

研究结果表明：在不改变现有给水处理设施的情况下，以二氧化氯作预氧化除藻剂，聚合氯化铝作混凝剂，高分子HCA作助凝剂，既可以有效降低水的浊度、控制水中余铝，又可以合理调节水的pH值，同时水中余氯还可以达到滤前加氯的效果，是处理夏季高藻期原水比较理想的工艺路线。

In addition, she holds the great strategic points of northern Europe,--- Alsace-Lorraine, the door to France; the Kiel Canal, giving her access to the Baltic without exposing herself to the necessity of utilizing the Sund; her allies hold the Swiss passes and the vital points affording passage into Russia and the Balkans.

德国人非常清楚地认识到了他们处于中心位置这一不可改变的事实，从军事的观点看，这一位置对于一个被迫进行防守或不作进攻准备的国家十分不利，但是他们也同样看到了中心位置带来的不可否认的优点，它给一个打算采取攻势的国家提供了极大的便利。

It is important for retransmitted messages to remain unaltered no matter how many times they are sent or else a great deal of confusion and unhappiness would ensue.

非常重要的是，对于重新发送的消息要保持没有改变，不管他们被发送多少次，否则，大量的困惑和不开心的事情将随之而来。

Dyed-in-the-wool彻底的,彻头彻尾的A: Susans a dyed-in-the-wool communist, and you cant change her mind.B: Yeah, she told me there will still be a revolution.

A：苏珊是彻底的共产主义者、你不可能改变她的念头。B：嗯，她还告诉我一场革命还将到来。

As a diatonic chord that the altered chords even do not belongs to the key, but it can not change the tonality, its function is to strengthen the harmony tension, enrich the harmonic color, and describe the music figures.

内容提要：变和弦作为不改变调性的非本调自然音的和弦，是音乐作品中加强和声力度、丰富和声色彩、表现和声手法、描绘音乐形象的一类重要的和声材料。

As a diatonic chord that the altered chords even do not belongs to the key,but it can not change the tonality ,its function is to strengthen the harmony tension,enrich the harmonic color,and describe the music figures.

变和弦作为不改变调性的非本调自然音的和弦，是音乐作品中加强和声力度、丰富和声色彩、表现和声手法、描绘音乐形象的一类重要的和声材料。

The rings, however, had not changed noticeably over thehundred years since Huygens's observations.

然而，自从Huygens的观察报告问世后，在这之后的几百年，土星环的改变一直是不明显的。

Loss of permafrost due to climate change in Canada's Northern Territories may increase runoff and sediment flowing into rivers and make some slopes more unstable and vulnerable to landslides.

多年冻土的丧失，由于气候改变在加拿大的北方领土可能会增加径流量和泥沙不断涌入到河流里和制造一些斜坡更加不稳定的和易受山体滑坡的攻击。

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。