银河系可说是我们周遭大质量螺旋星系的典型，根据观测到的大质量恒星数目判断，银河系的恒星形成率为每年数个太阳质量。
In our own Milky Way, which is quite typical of nearby, massive spiral galaxies, the number of observed high-mass stars indicates that stars are forming at a rate of a few solar masses a year.
平面内绕行，这个质量不是，呈放射状减小，而是，呈螺旋形减小，我们称之为中子星，周围的吸积盘，这个叫做吸收星。
They go around in the plane of the blackboard, say, and so this matter cannot fall radially in but it will fall in and spiral in and forms what we call an accretion disk around the neutron star.
在中断了通常的搜索远距离宇宙爆炸任务后，NASA的Swift人造卫星获得了邻近螺旋星系的紫外线高质量图像。
In a break from its usual task ofsearching for distant cosmic explosions, NASA's Swift satelliteacquired the highest-resolution view of a neighboring spiral galaxyever attained in the ultraviolet.
螺旋弹簧质量系统由于其结构特点及其缓冲作用在几乎所有机电设备和系统中都有广泛的应用。
Helical spring mass system (HSMS) is widely used in almost all of mechanical and electrical products due to its structure feature and elastic buffer ability.
目的研究不同机架旋转时间对64层螺旋CT图像质量的影响。
Objective To study the effects of gantry rotation time on image quality in 64 - slice spiral ct.
目的：对比分析两种不同方向的肺部螺旋CT扫描的图像质量。
Objective:To evaluate the image quality of lung spiral CT scanning in two different directions.
本文对螺旋弹簧质量系统动态响应的特征线法进行了研究。
The characteristics method of the dynamic response of the helical spring mass systems is studied.
简述了控制螺旋焊管钢带剪刃质量的两种无损探伤方法的探伤机理。
This paper introduces two methods of nondestructive testing mechanism for controlling strip shear knife quality in spiral welded pipe.
该机床能够加工出高精度、高质量的有芯或无芯的多股螺旋弹簧，满足了企业的需求。
The number control machine can process the cored and coreless spiral springs of many radices with high accuracy and quality, and meet the requirement of enterprise.
目的探讨影响16排螺旋CT心脏冠脉成像质量的因素。
Objective to study 16 row helical ct cardiac imaging quality influence factors.
目的：探讨影响16排螺旋CT心脏冠脉成像质量的因素。
Purpose: To study 16 row helical CT cardiac imaging quality influence factors.
由于气体只占螺旋星系质量几个百分点，研究人员为使模拟较容易处理而将之省略。
Because gas constitutes only a few percent of the mass of spiral galaxies, modelers had neglected it to make the simulations more tractable.
特点：结合单刃良好排屑和螺旋切削，可大大提高切割速度的同时保证产品质量。
Features: crumbs fast-removing and helical cutting, it will greatly increase the processing speed while ensuring quality.
为了减少建井费用、提高井眼质量，研究螺旋井眼的产生、危害及其防治提上了日程。
In order to reduce drilling cost and raise hole quality, it is necessary to investigate the formation, harmfulness and preventive treatment of the spiral borehole.
三辊弯板内承式螺旋焊管机组调型参数是保证焊管成型质量及其稳定性的一个重要因素。
The setting parameters of the three-roll bending plate internally -sup porting spiral welded pipe mill are critical for ensuring satisfactory and consistent quality of the welded pipe formation.
高频对焊代替高频搭焊是提高中直径螺旋焊管质量的可靠途径。
A reliable way to improve the quality of spiral pipe was the substitution of high frequency butt welding for HF lap welding.
目的：分析影响多层面螺旋CT冠状动脉成像质量的因素。
Purpose: To analyse the factors affecting image quality of coronary angiography with multi slice helical CT.
大喉管经改进后构成一段内螺旋管件，有利于提高油的雾化质量。
The improved big throat pipe forms a section of internal spiral pipe component, which is favorable to improve the quality of the oil atomization.
目的探讨心率及心率波动对16层螺旋CT冠状动脉成像（16-MSCTA）图像质量的影响。
Objective To investigate the influence of heart rate and fluctuation of heart rate on image quality of 16-slice spiral CT coronary angiography (16-MSCTA).
介绍了螺旋焊管生产中对头焊带钢的硬弯现象发生原因，对钢管质量的危害及防止措施。
The discussion involves such aspects as the cause of strip folding occurring in butt-welding process of spiral weld pipe, negative influence by such failure on pipe quality and preventive actions.
试验表明：该模型可有效控制螺旋转子的成型质量和成型效率。
The molding test shows that the mathematic model can control effectively the quality and efficiency of helix rotor molding.
结论64层螺旋ct冠状动脉成像质量受到患者心率、心率波动幅度、呼吸运动伪影及重建时相的影响。
Conclusion Image quality of 64-slice ct coronary angiography affected by the patient's heart rate, fluctuation of heart rate, breathing artifact and reconstruction phase.
螺旋焊接钢管的直径控制是螺旋焊管生产的重要质量指标之一。
The diameter control is one of the important quality index for spiral welded steel pipes.
本文主要介绍多排螺旋CT图像质量评价主要参数以及每种参数的主要影响因素。
This paper mainly introduced the important parameters for image quality of Multislice ct. The influencing factors of these parameters were also discussed.
首先确定多股螺旋弹簧的虚拟质量，建立了多股螺旋弹簧的动态模型。
The virtual mass of the spring was brought out firstly and the dynamic model was established sequentially.
针对影响螺旋焊管质量的几个主要缺陷，论述了原料带钢质量对生产高标准焊管的影响，并提出了解决方案。
For the main defects which affect spiral welded pipe quality, the material plate quality effect to strict specification pipe production is discussed, and the solving method is proposed.
结果表明：影响螺旋藻基因组dna制备质量和得率的重要因素之一是螺旋藻细胞壁的破壁程度。
The results show that the degree of breaking the cell wall is an important factor to restrict the quality and output of the genome DNA.
对加快多股螺旋弹簧的设计过程，提高设计质量具有一定的实际意义。
It is practice meanings to design the screw spring of many radices at faster speed and increase design qualities.
从原材料纯度、表面质量、弹簧腐蚀及端圈结构等几个方面阐述了影响转向架钢制螺旋弹簧疲劳寿命的因素。
The factors affecting fatigue life of coiled steel springs for bogies are expounded from such aspects as purity of raw material, surface quality, spring corrosion and structure of end coil.
从原材料纯度、表面质量、弹簧腐蚀及端圈结构等几个方面阐述了影响转向架钢制螺旋弹簧疲劳寿命的因素。
The factors affecting fatigue life of coiled steel springs for bogies are expounded from such aspects as purity of raw material, surface quality, spring corrosion and structure of end coil.
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