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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 didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。