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It is found that the unitarity of the effective meson theory resulted from resummation derivations demands an upper-limit to the momentum of vector meson.

我们发现，用重求和方法得到的等效介子理论，其么正性要求矢量介子的动量有一个上限。超过此上限，这种手征等效理论的描写方式失效。

Constructing a unitary matrix for transformation of coordinates by means of quadratic form theory,the Hamiltonian of the 3D coordinate-momentum coupling harmonic oscillator is transformed into diagonalmatrix,it not only offer a general mathematic method for solving this kind of problems,but also have an active effect upon upgrading students ability to solve physics problems by mathematical theory.

利用二次型理论构造一个幺正矩阵进行表象变换，将|x〉表象中的三模坐标-动量耦合量子谐振子体系的哈密顿量对角化，这不仅提供了一种解决该类问题的一般数学方法，同时对培养和提升学生运用数学工具解决复杂物理问题的能力也具有积极的指导作用。

In order to solve exactly the dynamic problems of the double coordinate coupling harmonic oscillators, the quantum unitary operator corresponding with classical canonical transformation is derived using the momentum eigenvector in Fock representation by constructing asymmetric integration.

为了精确求解双模坐标耦合谐振子体系的动力学问题，利用动量本征矢在Fock表象中的表示构造不对称积分，找到了与经典正则变换对应的量子么正算符。

The conservation laws of energy and momentum deduced by time and space symmetry is an universal law covering all physical fields.

由时空对称性导出的能量、动量等守恒定律，是跨越物理学各个领城的普遍法则。

At that time, to reactivate its world hegemony and effectively strike momentum for economic acceleration of the emerging economies had become an unpublicized secret in heart of American decision layer.

重振世界霸主雄风，有效打击新兴经济体的经济增长势头，此时便成为美国决策层心头一个"不便公开的秘密"。

Big Miyaji momentum has a turn and immediately rebuked two Miyaji not need so unsparing ...

大宫主的气势又马上一转并斥责二宫主没必要如此不留情。。。。

There undoubtedly is a risk that the economic upswing will lose momentum during the course of the year.

他说：无疑是一个风险，即经济回升将失去在这一年中的势头。

But when that momentum changes at support when the market is in an uptrend, we have a classic buying opportunity.

但是，当这一势头变化的支持时，市场正处于上升趋势，我们有一个典型的买进机会。

Mariners utility man Willie Bloomquist started the game at third base to give Adrian Beltre a rest. He said the momentum and atmosphere in Yankee Stadium could be felt.

水手队的工具人Willie Bloomquist今天担任先发3垒手，以便让Adrian Beltre休息一下，他说可以感受到洋基球场的气势和气氛。

According to the theory, the industry competitive field isa vector field, which has potential energy and momentum.

文中认为产业竞争场是一个矢量场，可分为外场和内场，并对场内各种矢量的指向进行了分析，揭示了竞争场上变量的流动机制，清晰地显示了弱势产业的变量特征，进而梳理了调整有关变量的思路和战略方法。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。