不稳定性

Objective To evaluate the effect of genomic instability on prognostics in nasopharyngeal carcinoma.

目的：探讨鼻咽癌基因不稳定性对预后的意义。

According to the research accomplishment in the hilly area of south Ningxia in resent20 years, the authors put forward the major way for farming and graziery developing healthily only when grassland agriculture possessing the basic function of contending with the unstability of district ecology.

并根据宁南山区各科研基点近20年来的研究成果，提出了草地农业具备了与地域生态学上不稳定性相抗衡的基本功能，是解决这类地区农牧业生产向良性循环方向发展的主要途径。

1Unequal number of univalents with decreased degree of synapsis and lagging chromosomes occurred in meiosis.The abnormal chromosomal behavior correlated with heterogenicity gave rise to unequal allocation of homogenous chromosomes to daughter cells and resulted in the deletion of functional chromosoms,thus led to the occurence of a certion proportion of aborted pollens.(2)The interaction between genetic imbalance and such environmental factors as temperature,etc.,further drew forth physiological and even structrural imbalance,with abnormal development of pollen mother cells and tapetal cells,and consequently resulted in no or very few production of pollens.The difference in the interaction between environment and genotype reflected on the unstability of pollen abortion in different years.

1在减数分裂中有数目不等的联合程度较差的单价体以及落后染色体出现，这种与异质性相关的染色体行为异常，导致同源染色体向子细胞的不均衡分配，造成具功能染色体的缺失，从而引起毛白杨一定比率的败育花粉的产生；(2)遗传上的不平衡与温度等环境因子相互作用，进一步引发毛白杨生理乃至结构上的不平衡，花粉母细胞和绒毡层细胞发育异常，从而造成不产粉或产粉较少；环境与基因型互作的差异性导致了花粉败育的年度不稳定性。

Taking heteronuclear atoms of 87Rb and 41K as an example, we numerically give the unstable region.

并以异核原子87Rb和41K混合凝聚体为例，数值地给出了系统发生动力学不稳定性的区域。

Primary hepatocellular carcinoma is one of the most common neoplasms in China. Most previous experimental researches were against tumor cells which had characters of unable transmissibility, high heterotype and high mutation rate, so satisfied curative effects could not be obtained.

原发性肝癌是我国常见的恶性肿瘤之一，以往的实验研究多数针对肿瘤细胞本身，但瘤细胞具有遗传不稳定性、高突变率和高异型性等特点，因此、未能取得满意的疗效。

The experiment results demonstrate that the proposed method overcomes the instability and incontinuity of information occurring in the image fusion decomposed by multi-scale before,increase the visual effect and include more information.

试验结果表明，与传统方法相比，这种方法克服了在图像多尺度分解过程中产生的不稳定性和不连续性的缺点，可以使图像的视觉效果更好，并包含更多的信息。

With increasement of the laser heating time, the fluctuation increased.

文中还提出了减小激光输出不稳定性影响的几条途径。

Confronted with the complicated domestic and international situation,we should recognize the favorable conditions and positive factors ineconomic and social development, and strengthen our resolve andconfidence in overcoming difficulties.

在错综复杂的国内外形势下，我们既要看到经济社会发展的有利条件和积极因素，坚定战胜困难的决心和信心；又要充分估计形势的不确定性、不稳定性，保持清醒头脑，增强忧患意识，宁可把形势估计得严峻一些，把困难考虑得充分一些，做好应对更大困难的长期准备。

But, its insoluble and infusible properties make it difficult to study its chemical structure and to process it in solution or melt.

但是，聚乙炔不熔融、不溶解和对空气不稳定性限制了对其性能的研究。

Due to the fact that the intercarrier spacing in OFDM is relatively small, OFDM transceivers are somewhat more sensitive to phase noise compared to single carrier transceivers. Thus this problem must be carefully considered in designing an OFDMbased system since an accurate prediction of the tolerable phase noise can allow designer to relax system specifications. According to spectrum theorem, two components of phase noise were analyzed: common phase error and intercarrier interference. On the basis of the analysis, the performance of OFDM was given for the case where phase noise has been added to the signal, and an optimal design criterion for OFDM parameters was proposed that allows to improve the phase noise error correcting capabilities in OFDM receiver.

由于采用子载波间相互正交的结构，OFDM系统对于由本地振荡器不稳定性所导致的相位噪声影响非常敏感，针对公共相位误差CPE和载波间干扰ICI两种影响表现形式不同的干扰项，从功率谱密度函数这一独特角度分析了相位噪声对OFDM系统性能的影响，提出了旨在提高接收机抵抗相位噪声能力的OFDM系统关键参数优化与设计准则，可在对所设计OFDM系统性能加以提高的同时，有效降低对接收机前端模拟振荡器件和相位噪声抑制单元的性能指标要求，从而降低接收机硬件实现成本。

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％。