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Any of various small, graceful, swift-flying passerine birds of the family Hirundinidae, having long, pointed wings, a usually notched or forked tail, and a large mouth for catching flying insects and noted for their regular migrations in large numbers, often over long distances.

燕子：燕科体小、优美且飞行快疾的燕雀类小鸟，具有长而尖的翅膀、通常为V形或叉形尾巴和用于抓飞虫的大嘴，并因它们长距离的规律性集体大迁徙而闻名 Any of various similar birds， such as a swift。

On the other hand, a is invariant in G/N if χ is viewed as a character of G/N for normal subgroup N≤kerχ.

另外，我们定义的特征标次数的商a与我们将χ看成那个商群G／N无关。

Results:In group A,avoiding the gene ral low immunity leave as a result of the cellular immunol index restore swifty and maintain at relatively high level post-operatively,while in group B,the cel l ular immunol function is obviously low and the restoration is slow.

结果：A组患者的细胞免疫指标在术后迅速恢复且维持在高水平状态，避免了机体由于手术打击而导致术后免疫力普遍降低的现象。

The assault began early. Derek Jeter, relishing his role as a Mets killer this weekend, followed Saturday's four-hit performance with a one-out single in the first inning. Hernandez retired Bobby Abreu but made the mistake of falling behind 2-and-0 to Rodriguez. The next pitch wound up in the Mets' bullpen far beyond the retired numbers in leftfield.: V5 ~: U. G4 ?. m

攻势早早就展开了，吉特这个周末又称职扮演梅子杀手的角色，继周六演出连续四支安打的优异表现，一局下半一人出局时打出一垒安打，赫南德兹解决阿伯后，在两坏球没有好球的情况下犯下大错， A-Rod 打中他的下一球，越过梅子队牛棚落入右外野退休号码牌后头。

R d; '+?$ z# v2 {5 U'}* I It occasioned my being more considered by Mr. Palmer as a young man of some ingenuity, though he seriously expostulated with me upon the principles of my pamphlet, which to him appeared abominable.

v8 b8 o$ j 4 a a 突然我的作品为帕尔马斯先生发现，虽然他严重抗议我这本小册子的主张，据他看来是非常厌恶的，然而却因一个年轻人有这样的聪明而多加注意。

The new method formulizes the immune response as a quaternion AIR=, where G denotes exterior stimulus or antigen, I denotes the set of valid antibodies, R denotes the set of reaction rules describing the interactions between antibodies, and A denotes the dynamical algorithm describing how the reaction rules are applied to antibody population.

新方法将免疫响应过程建模为一个四元组 AIR=，其中 G 为引发免疫响应的外界刺激，即抗原； I 为所有可能抗体的集合； R 为抗体间相互作用的规则集合； A 为支配抗体反应、指导抗体进化的动态算法。

Choose the word or set of words that, when inserted in the sentence, best fits the meaning of the sentence as a whole.According to Burgess, a novelist should not -------, for sermonizing has no place in good fiction.

答案： D ，空格后面是一个for引导的原因状语从句，&sermonizing&正好应该与空格对应，直接找它的同义词，得到答案D，其中A是发明，B是冒犯，C是告知，E是歪曲，扭曲。

Perhaps more important is that A/V receivers generally work as a digital amplifier for your audio system.

也许更重要的是， A / V接收器一般工作作为数字放大器的音频系统。

Only in the very last utterance of the singer is the note A-sharp introduced, alien to the prevailing tonal plane of D major, as a signal to the departure of the lovers' spirits from this universe.

曲终之际升A音符骤然出现，听来与D大调的整体调性格格不入，藉此暗喻爱侣魂魄已离开尘世。

Foot and mouth disease is a highly contagious disease of cloven-hoofed animals. It is one of the most important animals infectious diseases. It is defined as A class animals infectious disease by OIE and Our Country .

口蹄疫是由口蹄疫病毒(foot and mouth disease virus， FMDV)感染引起的偶蹄动物的高度接触性传染病，是世界上最重要的动物传染病之一，国际兽疫局及我国都将该病列为A类家畜传染病之首。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。