法向量或者指向我们，或者背向我们,这要根据我们选的方向来定。
Well, the normal vector is either coming straight at us, or it's maybe going back away from us depending on which orientation we've chosen.
由于彗尾是因为太阳光和太阳风成形的，所以彗尾一般背向太阳。
Since comet tails are shaped by sunlight and the solar wind, they always point away from the sun.
背向散射法是光纤光缆测量的最佳方法。
The backscatter method is the best one for measuring optical fiber cable.
而我国主要普及的是背向滑步推铅球技术。
The technique of shot put in China mainly focuses on sliding step.
分别测量其左室后壁及室间隔的背向散射参数。
Ultrasonic backscatter parameters in left ventricular posterior wall and interventricular septum were measured.
目的：探讨正性肌力药对心肌背向散射特性的影响。
Objective: To discuss the influence of dobutamine on myocardial integrated backscatter.
目的探讨背向散射积分对早期心肌缺血的识别价值。
Objective To assess the value of integrated backscatter differentiating early phase of myocardial ischemia.
这个街区是这样设计的，房子的正面都背向繁忙的街道。
The estate is so designed that the front of each house faces away from busy roads.
在光纤衰减的测量中，背向散射法显示出很大的优越性。
In the measurement of optical fiber attenuation, the backscattering method has been shown to have great advantages.
目的：探讨不同程度缺血心肌背向散射特性变化的规律。
Objective: To quest for the rule that integrated backscatter of myocardium with different grade of ischemia changes by.
向后跳水：运动员背向水面起跳，在空中向后翻腾入水。
Back dive: a dive where a diver takes off with his back to the water, and spins backwards in the air.
反手击球如球拍等的一击或一动，手背向外，胳膊向前移动。
A stroke or motion, as of a racket, made with the back of the hand facing outward and the arm moving forward.
目的应用超声背向散射积分技术定量评价正常兔肾的不同结构。
Objective To assess quantitatively different structure section of healthy rabbit kidneys by the ultrasound integrated backscatter (IBS).
目的：研究心肌背向散射积分联机分析的临床价值和影响因素。
Purpose: To study the clinical utility and influence of myocardial integrated ultrasound backscatter.
介绍了一种用于高品质射频集成电感的厚膜多孔硅背向生长技术。
A backside growth technique of thick porous silicon layers for the on-chip RF integrated inductor is presented.
目的探讨超声背向散射积分(IBS)对急、慢性肾病的诊断价值。
Objective To explore the value of the ultrasound integrated backscatter (IBS) in diagnosing acute or chronic renal parenchyma disease.
用OTDR测试光纤线路时，其背向瑞利散射信号曲线上常出现幻峰。
There may be unreal peaks on backscattering signal curve in the measurement of optical fiber links by OTDR.
目的：验证商用超声诊断仪所测定的心肌背向散射信号强度的可靠性。
Objective: To testify the reliability of myocardial backscatter intensity measured by commercial ultrasonography.
目的探讨心脏灌注压、血液浓度和血流速度对组织背向散射强度的影响。
Objective To explore the influence of perfusion pressure, blood concentration and blood flow velocity on myocardial ultrasonic backscatter integration.
结论：心肌背向散射参数可以用于评估高血压患者心肌肥厚的不同程度。
Conclusions: Ultrasonic integrated backscatter parameters may be used to evaluate to the degree of myocardial hypertrophy in the patients with hypertension.
尾流光的背向散射特性是水下航行体跟踪、识别和定位目标的重要参数。
The optical back scattering characteristic of wake is a most important parameter for under water targets' scout , recognition and position.
目的：探讨高血压患者心肌不同程度肥厚背向散射参数变化的临床意义。
Objective:To evaluate the clinical significance of myocardial backscatter parameters of hypertrophic myocardium in the patients with hypertension.
背向滑步推铅球左侧技术中的“过早转肩”是公认的易犯错误动作之一。
In the left side technology of backward slide of shot put "early turning the shoulder" is an easily mistaken movement.
目的：探讨高血压病患者心肌不同肥厚程度背向散射参数变化的临床意义。
Objective: To evaluate the clinical significance of myocardial backscatter parameters of hypertrophic myocardium in the patients with hypertension.
结论超声背向散射技术能定量评价脂肪肝，且能判断肝脏脂肪浸润的程度。
Conclusions Ultrasonic integrated backscatter is able to quantitatively evaluate fatty liver and judge the extent of fatty infiltration.
结论超声背向散射技术能定量评价脂肪肝，且能判断肝脏脂肪浸润的程度。
Conclusions Ultrasonic integrated backscatter is able to quantitatively evaluate fatty liver and judge the extent of fatty infiltration.
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