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Sign pattern A is a SAP if every monic real polynomial of degree n can be achieved as the characteristic polynomial of a matrix with sign pattern A.

若给定任意一个n次首一实系数多项式f，都存在一个实矩阵B∈Q，使得B的特征多项式为f，则称A为谱任意符号模式。

An n×n sign pattern A is a spectrally arbitrary pattern if for any given real monic polynomial f of degree n, there is a real matrix B∈Q and B has characteristic polynomial f.

设A为n阶符号模式矩阵，若对任意给定的一个n次首1实系数多项式f，都存在一个实矩阵B∈Q，使得B的特征多项式为f，则称A为谱任意符号模式。

Using Pell equations on A,we give a new proof of the well-known fact that ifthe ideal class number of a real quadratic function field K = k equals to 1,thenD must be P or QR, where P,Q,R∈A are monic and irreducible ,and Q,R have odddegrees.

二我们应用A上的Pell方程这一初等方法重新证明一个已知的结果：实二次函数域K = k理想类数为1时， D只能为P或QR，其中P，Q，R∈A首一不可约且Q，R次数为奇数。

And the students? In October, we had a surprise "graduation" ceremony in Knoxville for the 40 who sparked my interest in Clayton. I donned a mortarboard and presented each student with both a PhD (for phenomenal, hard-working dealmaker) from Berkshire and a B share. Al got an A share. If you meet some of the new Tennessee shareholders at our annual meeting, give them your thanks. And ask them if they've read any good books lately.

至於那40位有功的学生，我们十月在Knoxville举办了一次特别的毕业典礼，我身著学士帽，亲自颁发每位学生一张Berkshire PhD(专门用以表彰对於Berkshire购并有功人员)外加每人一股Berkshire B股，至於Al教授则获赠一股A股，所以如果各位在今年的股东大会上遇到来自田纳西州的新股东，请向他们表示感谢，并记得顺便问问他们最近读了什麼新书。

The result showed that the size of mud flat wetland decreased rapidly: from 19705.09 hm2 in 1987 to 4773.08hm2 in 2002, a 75.78% drop in 15 years. In addition, the annual reduction rate of the mud flat wetland size was 995.47 hm2/a, which was 36.54% more than the annual reclamation rate, 729.08hm2/a.

结果显示，滩涂湿地的面积在逐年变小：从1987年的19705.09 hm2 锐减到2002年的4773.08hm2，减少了75.78%；并且滩涂湿地面积的年减少率为995.47 hm2/a，比年围垦率的729.08hm2/a增加了36.54%。

The characters of the system selects 12 - bit A/D chip converter with high sampling rate and high precision to switch the circuit design. Using multiaddress technology finishes the A/D conversion of the multichannel signal.

本采集系统的特点是选用高采样率高精度的12位A/D转换芯片进行A/D转换电路设计，并采用多路复用技术实现了多通道信号的A/D转换，保证了系统的信噪比，提高了系统的测量精度。

Multiple wavelengths characteristics of dayside aurora activities were investigated with these keograms and in reference to all-sky images. It was found that there are three repeatedly appearing aurora activity regions along the dayside aurora oval. They are, Region A around 0900MLT in which aurora moves poleward while its intensity decreasing, and its form changingfrom arc to corona with time; Region B around 1330MLT in which aurora moves equatorward while its intensity increasing, and its form changing from corona to arc in time; Region C around 1330MLT in which aurora expands poleward while its intensity decreasing, and its forma evolving from arc to multiple arcs in time. There is a narrow belt of aurora activity in North-South direction between Regions A and B, which is dominated by weak and red corona aurora.

初步分析发现，沿日侧极光卵不论磁静日还是磁扰日，在三个波段上都同时观测到了四个重复出现的极光活动区，即0900MLT附近的A区、1330MLT的B区和1630MLT的C区以及1200MLT附近的G区。A区内的极光活动由低纬向高纬运动，强度逐渐变弱，形态由较宽的弧状极光向冕状极光演变；B区内的极光活动由高纬向低纬方向运动，形态呈现为冕状极光向较窄的极光弧的演变，极光强度逐渐增强；C区极光活动向高纬方向展宽，强度逐渐变弱，极光由单弧向多重弧演化；而在A与B之间存在一个纬度范围相对较窄的极光活动区G区，该区的极光呈现暗弱的冕状极光。

Consumption of infected meat by ferrets resulted in respiratory system infection only (due to A/Muscovy duck/Vietnam/209/05 and A/Whooper swan/Mongolia/244/05 viruses) or in both severe respiratory and systemic infection with predominant involvement of the liver, pancreas, and large and small intestine (due to A/Vietnam/1203/04 virus).

由雪貂消耗的受感染的鸡肉只导致呼吸系统感染(由于 A/莫斯科鸭/越南/209/05和 A/Whooper 天鹅/蒙古/244/05病毒)或严重的呼吸和全身感染，伴随显性的肝，胰腺，和大小肠侵入(由于 A/越南/1203/04病毒)。

Called "the last great race on Earth," the Iditarod (pronounced eye-DIT-a-rod) consists of teams of 12 to 16 dogs pulling a sled driven by a man or woman, called a "musher."

艾迪塔罗德(念做 eye-DIT-a-rod)赛事被称做「世上最后的伟大竞赛」，它的参赛队伍是由12至16只狗组成的拉雪橇队，负责驾驶这支雪橇队的男人或女人则叫做「 musher 」。

In IPF, patients, whose duration of symtoms ≤3 months, had neutrophile count, IgG/A IC/A and HA/A higher than those, with symtoms≥24 months, and in Sar group, it was shown that HA、HP and TNF were increased in stage Ⅱ and stage Ⅲ.

与病程、病期的关系：IPF患者病程≤3月者，中性粒细胞百分比，IgG/A、IC/A、HA/A均较≥24月者明显增高(P＜0.05)；S〓；组中HA、HP、TNF则提示Ⅱ、Ⅲ期病例明显高于Ⅰ期病例。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。