数量级

L〓 can accept the electron from the active PS Ⅱ center completely, and that DCBQ can only accept a part of the electron from the inactive PS Ⅱ center (40%) even at the concentration 120μ mol.

但DCBQ的浓度在比Cao等几乎高出一个数量级（120μmol.L〓）的情况下，也只接受部分无活性PS Ⅱ中心的电子（40％）。

This procedure allows us to keep track of the magnitudes of the terms that occur.

这种做法使我们可以时常注意所出现各项的数量级。

The mesophytes and perennialherbs are most in the middle part of northern slop of Tianshan mountains rangeland plants.

首次用生态经济类群标准对该地区草地植物分类，使每个亚类群的属性、特征和在草地中所起的作用有了数量级的认识。

Umbers of virtually any magnitude can be stored and are guaranteed portable among different systems operating Oracle, up to 38 digits of precision.

UMBER 数据类型可以存储任意数量级的数字， NUMBER 数据能够在运行 Oracle 的不同操作系统间迁移，数字的精度最高可达 38 位。

Characteristics and principles of time clustering and frequency with a seismic sequence of more 380 years (1615 —1998) are performed using fractal theory and rescaling range analysis theory. It is concluded that the fiactal dimensions of seismic subset are similar to each other, the mean value is about 0.405, and interval of scale invariance can change 1-2 magnitude order. It is also found that the Hurst index ranges from 0.5412 to 0.5580. The results show that there is of statistical self-similar among different magnitude earthquakes in the area of bridge site.

应用分形理论和R/S分析原理，编写了程序，分析和研究了桥址区的380多年（1615～1998）地震序列的地震时间从集和地震频度特征及规律，得出桥址区不同震级范围的子集合具有近似相等的分维值，约为0.405，子集合无标度区可跨1～2数量级；不同震级层次的地震频度Hurst指数为0.5412～0.5580，都表明了桥址区不同震级层次的地震之间具有统计自相似性。

However, the pionic decay widths of Dsj(2317) and Dsj(2460) are too small to fit the experimental data.

但是，与现有的实验结果比较，D*sj(2317)，Dsj(2460)的π介子衰变宽度要小一个数量级。

Asked whether it could amount to 1bn, he said:"That order of magnitude is not fundamentally far off our working hypothesis."

当被问及成本是否可能高达10亿欧元时，他表示：&从根本上说，这个数字的数量级与我们的工作假设差得不远。&

We also simulate the environment of photon experiment, and calculate the effect by use of fourfold symmetry torsion pendulum, we find that the double frequency effect caused by gravitational gradient is reduced a magnitude when we buildup the symmetry of measurement system.

我们还对二重对称扭秤的光子实验数据进行了分析，结果发现二倍频的效应为10~(-12)Nm 的量级，通过计算分析我们发现扭秤周围环境的不对称所引入的引力梯度效应是不容忽视的，因此针对喻家山人防山洞的具体情况，我们对光子实验的实际环境进行了模拟计算，理论分析结果表明对于二重对称的扭秤而言，环境不对称的影响引起的力矩效应为5.4940×10~(-10) Nm，对于四重对称的扭秤来说，效应为1.8668×10~(-11)Nm，可以看到随着扭秤对称性的增加，引力梯度的效应减小了一个数量级。

Because the specific impulse of electric propulsion is ten times more than the chemistry propulsion, it appears very important in the application of satellite attitude control and station keeping, aerocraft deep space exploring and interstellar travelling. It can increase the payload and extend life, decrease the passive weight.

由于电推进的比冲比化学推进比冲高出一个数量级，因而在卫星姿态控制、位置保持以及空间飞行器深空探索、星际航行的应用中有重要意义，它或可以提高有效载荷、延长寿命，或可以降低消极质量。

The study shows that the activation energy of most shell is 1/3-2/3 of the limestone, the product-layer coefficient magnitude is 1 magnitude higher than that of limestone, and the specific surface area, specific pore volume, and the average pore radius are all bigger than that of limestone. So shells are fit for coal combustion sulfur retention in high temperature (900-1000℃).

贝壳与石灰石的比较性实验表明：大部分贝壳的固硫反应活化能是石灰石的1／3-2／3，产物层扩散系数比石灰石高出一个数量级，内部微观结构如比表面积、比孔容、最可几孔半径等都比石灰石大，贝壳更适合作高温（900℃-1000℃）下的燃煤固硫剂。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。