1. 数量级：一个数量级(order of magnitude)就是十倍的差异. 例如说两数相差三个数量级,其实就是说一个数比另一个大一千倍. 我们用科学记数法就能简单地描述数量级.

2. 量级：1945年美国第一枚原子弹爆炸现场,费米把撕碎的纸屑扔向空中,根据纸屑在爆炸冲击波作用下离开原点的距离来估计爆炸当量,结果跟后来计算机精确计算的结果所差无几,费米这种估计物理量的数量级(ORDER OF MAGNITUDE)的方法直到现在也是物理学

3. 级：我们没有任何理由作出这样的假设:买方占有母牛比卖方占有母牛更有价值[因为它的真实价值是与当事人的想象有差距的量数级(order of magnitude)],卖方在认定该牛为不能生育时也没有粗心大意;事实上,卖方犯了一个合理而又(在合理成本条件下)不可避免的错误.

4. 恒星等级数量级：order of light 灯塔等级 | order of magnitude 恒星等级;数量级 | order of magnitude 恒星等级数量级

1. It is found that the phase-conjugate fifth-order polarization beat is due to the interference between fifth- and fifth-order optical polarizations, the beat signal oscillates not only temporally but also spatially, and the measurement accuracy for laser absolute frequency could reach the same order of magnitude as the laser linewidth.
    发现相位共轭五阶极化拍频是五阶非线性光学极化强度之间干涉的结果，拍频信号不仅进行着时间振荡而且同时进行着空间振荡，它对激光绝对频率的测量可达到与激光线宽同一量级的精度。

2. The problem is of the same order of magnitude for all concerned.
    这个问题对有关各方的影响是一样大的。

3. High temperature carburizing allows order-of-magnitude increases in case depth and 1000 VHN case hardness without the formation of detrimental primary carbides.
    高温渗碳允许数量级的增加硬化深度和1000VHN 表面硬度，而不产生一次碳化物。

4. danci.911cha.com

4. The present crustal accretion model at a fast spreading ridge predicts at least an order of magnitude difference on average in the crystallization time, the time for a crystal to cool itself to a given temperature, between the upper gabbros and lower gabbros.
    通过海洋地壳生成模型得到的典型快速扩张的太平洋中脊处海洋地壳内的热结构和速度场，推算出海洋地壳内的辉长岩层上、下组的成岩时间存在大于一个数量级的差异(成岩时间是指岩浆降温到某一指定温度时所经历的时间)。

5. The time required for equalizing the carbon concentration enriched in the retained austenite is at least one order of magnitude lower than that for the formation of lath martensite.
    残余奥氏体均匀富碳的时间落后于马氏体条的形成至少达1个数量级。

6. In order to guarantee the precision of centering and magnitude determination, a method for accurate partial background estimation is given.
    给出了一种对局部背景进行精确估计的方法，保证了星象中心和星等的计算精度。

7. The magnitude of the stress is ~100MPa, which is the same order of force that causes crustal fractures.
    对流应力的量级为～100Ma，这与导致地壳破裂的应力量级相当。

8. The author has made a detailed analysis of the satellite gravity data over Wenchuan, Motuo, Zhongba, Jiashi and Taiwan Areas in China, where earthquakes more than magnitude of 6 took place in recent several decades. It is surprising that the gravity field patterns over these areas are extremely similar, which is characterized by the following features:(1)Paired positive and negative anomaly.(2)Epicenters usually were located between the pairs where the gradient of gravity field was the steepest.(3)The value of positive peak increased and its width decreased at higher order field.(4)The distance between positive and negative peaks varies in different tectonic background.(5)Different styles of crustmantle material diapirism in different stress fields. Geologically, rheological diapirism of high density crustmantle material could be a reasonable explanation to this unique pattern.
    笔者详细分析了中国汶川、墨脱、仲巴、伽师和台湾等地的卫星重力资料(这些地区在近几十年来均发生过6级以上的大地震)，惊奇地发现，在这些地区，卫星重力场的样式具有极大的相似性，它们表现在：(1)卫星重力场的正负异常值成对出现；(2)震中通常位于重力场峰值间的陡梯度带；(3)由低阶到高阶的重力场正异常的峰值增大而宽度变窄；(4)正、负峰值间的距离随所处的大地构造背景而变；(5)不同应力场壳幔物质底辟的样式不同，从地质上看，高密度壳幔物质的流变底辟作用，可以合理地解释这种独特的样式变化。

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9. Although the bulk Ge and Si are indirectband-gap semiconductors and GaAs is a direct band-gap semiconductor, and theirband-gaps are obviously different from each other, their EL emitting wavelengths arevery close, and their EL luminescence efficiencies are in the same order of magnitude.
    虽然这三种结构中所用半导体层完全不同，Ge、Si为间接禁带半导体，GaAs为直接禁带半导体；三者体材料的禁带宽也有明显差别，然而它们发光的波长范围非常接近，发光效率也在同一量级。

10. The high modal birefringence with magnitude of order of 10－3 has been obtained.
    结果获得了10－3量级的高双折射。

11. This liquid reaction product of LiI, I 2, and P2VP provides an order of magnitude enhancement of the electrolyte conductivity.
      这个液态反应产生碘化锂、碘、和P2VP将电解质的电导增加了几个数量级。

12. Particle physics experiments and geophysical results show that the distance between two points F charge order of magnitude of 10-15-109 cm in the context of Coulomb's law is extremely accurate.
      粒子物理实验和地球物理实验结果表明，两点F电荷之间距离的数量级在10－15—109厘米的范围内，库仑定律是极其精确的。

13. The difference between the above two types of heat exchange is shown from the aspect of the order of magnitude.
      在安全壳事故后冷却中，安全壳相当于一个上下端开口的通道，其热量的散发形成烟囱效应，驱使外界空气从下部开口流进此通道，将壳内热量带走后，从上部开口流出。

14. The results show that in the later stage of the nucleation process, ① The maximum slip velocity is monotonically accelerating; ② The slipping hot spot migrates spontaneously from a certain instant, and such migration is spatially continuous; ③ When the maximum velocity reaches a detectable order of magnitude (at least one order of magnitude greater than the loading rate), the remaining time is 20 hours or more, and the temporal variation of slip velocity beyond this point may be used as a precursory indicator; ④ The average slip velocity is related to the remaining time by a log-log linear relation, which means that a similar relation between rate of microseismicity and remaining time may also exist; ⑤ When normal stress variation is taken into account, time scale of such processes can be extended by about 2 times.
      结果表明，在成核的后期阶段：①最大位移速率单调加速增加；②滑动热点在后期阶段开始自发性迁移，且在空间上连续；③当最大滑动速率达到可以明显探测的量级时（高於载入速率一个数量级以上），倒计时间为20小时或更长一些，这时的速率变化可作为临震预测标志；④平均滑动速率与倒计时间的关系在临震阶段呈对数线性趋势，由此可推测微震活动增长率与倒计时间同样存在对数线性关系；⑤正应力的变化对上述时间尺度有延长作用，使之大致增加到原数值的2倍。

15. The mobility estimated with this modle is of the same order of magnitude as the experiment value.
      用此模型估计的迁移率值μ与实验值在数量级上相符。

16. This method realized real-time deducting background noise and improved measuring sensitivity, is of one order of magnitude.
      实现了测量系统对背景噪声的实时扣除，使系统的测量灵敏度约提高了一个量级。

17. The experimental results indicated that the proposed algorithm was about one order of magnitude faster than RCD method, with its circle detection precision being higher than a level of half a pixel, and with its strong robustness to both noises and possible local vitium of information.
      中文摘要：实验结果表明：该算法在检测速度上较随机圆检测算法约快一个数量级，圆参数检测误差小于半个像素，并具有噪声鲁棒性强和对局部信息缺损不敏感等特点。

18. It is an order of magnitude and scale greater than anything that has been attempted.
      这所需要的考量及投入的规模，比起任何已有的工程都要大得多。

19. According to water quality characteristic of the Gaobeidian, we confirm COD as a main water quality guideline, studying the relation between COD and chlorine dioxide dose, that we obtain the COD and C satisfy a linear equation, which is C=0.0264CCOD + 0.0423, when the turbidity is about 1 degree, and the coli-group`s order of magnitude is 103.combining other reclaimed water disinfection influence factors, analyzing and receiving the relation equation between the water quality guideline and chlorine dioxide dose.
      并且对于影响二氧化氯消毒的浊度和大肠菌群数指标对方程进行拟合。得出在浊度大于7NTU时，根据COD计算出的投加量应增大1.5倍。

20. The experiment results show that the improved coding efficiency, up to 50%, comes with a complexity increase of more than one order of magnitude at the encoder.
      测试结果表明这些新特征使H.264/AVC编码器提高50%编码效率的同时，增加了一个数量级的复杂度。

1. a degree in a continuum of size or quantity

    e.g. it was on the order of a mile
           an explosion of a low order of magnitude

    Synonym: order

2. a number assigned to the ratio of two quantities
    two quantities are of the same order of magnitude if one is less than 10 times as large as the other
    the number of magnitudes that the quantities differ is specified to within a power of 10

    Synonym: magnitude