聚集

The results show that proper RRA heat treatment can improve SCC properties with retention of the high strength of T6 level. After pre-aging at 100 ℃ for 24 h, retrogression at 200 ℃ for 7 min, and reaging at 100 ℃ for 24 h, the ultimate tensile strength, yield strength and elongation of the alloy are 795 MPa, 767 MPa and 9.1%, respectively. Meanwhile the failure time of the alloy applied to tensile strength of 210 MPa in 3.0%NaCl+0.5%H2O2 corrosion condition is longer than 720 h. The corresponding TEM observation shows that after retrogression for 7 min and re-aging treatment, the microstructure of grain boundary is similar to that treated in the T73 condition with coarsen and isolated distribution, and the microstructure inside grain is similar to that treated in the T6 condition with small and homogeneous distribution.

研究结果表明：在峰值时效T6状态下合金强度高，但抗应力腐蚀性能差；采用合适的RRA热处理工艺既能使合金保持T6状态下的高强度的同时，又能显著改善合金的抗应力腐蚀性能；经回归7 min RRA处理后合金的晶界类似T73态析出相聚集粗化，而晶内类似T6态析出相细小弥散分布，在拉伸应力为210 MPa和3.0%NaCl+0.5%H2O2腐蚀液中，其断裂时间大于720 h，相应的抗拉强度、屈服强度和延伸率分别为795 MPa， 767 MPa和9.1%，显示优越的综合性能。

The results show that proper RRA heat treatment can improve SCC properties with retention of the high strength of T6 level. After pre-aging at 100℃ for 24 h, retrogression at 200℃ for 7 min, and reaging at 100℃ for 24 h, the ultimate tensile strength, yield strength and elongation of the alloy are 795 MPa, 767 MPa and 9.1%, respectively. Meanwhile the failure time of the alloy applied to tensile strength of 210 MPa in 3.0%NaCl+0.5% H2O2 corrosion condition is longer than 720 h. The corresponding TEM observation shows that after retrogression for 7 min and re-aging treatment, the micro- structure of grain boundary is similar to that treated in the T73 condition with coarsen and isolated distribution, and the microstructure inside grain is similar to that treated in the T6 condition with small and homogeneous distribution.

研究结果表明：在峰值时效T6状态下合金强度高，但抗应力腐蚀性能差；采用合适的RRA热处理工艺既能使合金保持T6状态下的高强度的同时，又能显著改善合金的抗应力腐蚀性能；经回归7min RRA处理后合金的晶界类似T73态析出相聚集粗化，而晶内类似T6态析出相细小弥散分布，在拉伸应力为210 MPa和3.0%NaCl+0.5%H2O2腐蚀液中，其断裂时间大于720h，相应的抗拉强度、屈服强度和延伸率分别为795 MPa，767 MPa和9.1%，显示优越的综合性能。

The spatial distribution patterns of cochineal female adult were studied by 5 aggregation degree index.

应用5种聚集度指标对胭脂虫雌成虫的空间分布型进行了研究。

The results showed that the spatial distribution patterns of cochineal in cactus belonged to aggregation distribution, the basic component of distribution was individual population, the probability distribution was in accorded with negative binomial and the cochineal mainly distributed the second and third stem in cactus.

结果表明，该虫在寄主仙人掌茎片上的空间分布型属于聚集分布，分布的基本成分是个体群，概率分布符合负二项分布，主要分布在仙人掌的第2和第3级茎片上。

Grouping.Grouping is acharacteristic of dermatitis herpetiformis,herpes simplex,herpes zoster,and late syphilitic eruptions.Small lesions arranged around alarge one are said to be in acorymbose arrangement.Concentric annular lesions are typical of borderline leprosy and erythema multiforme.These are sometimes said to be in acockade pattern,like the tricolor cockade hats worn by French revolutionists.Flea and other arthropod bites are usually grouped and linear(breakfast-lunch-and-dinner sign).Grouped lesions of various sizes may be termed agminated.

群集群集是疱疹样皮炎、单纯疱疹、带状疱疹和梅毒疹的特点小的皮损围绕大的皮损排列称为伞状排列同心圆形皮损是中间界线类麻风和多形红斑的典型皮损这种皮损有时被描述为帽章的形式，就象法国革命者所戴三色帽章跳蚤和其他节肢动物的咬痕常呈群集或线性分布各种大小的皮损聚集在一起术语称为"簇集"

A crowd quickly assembled to watch the cockfight.

人们立即聚集起来看斗鸡。

You Look , The Coliseum sea of people, friends in all corners of the globe gathered in this!

你瞧，体育馆人山人海，五湖四海的朋友都聚集在这了！

And you can say, well, I can collect a lot of silly people.

而且你可以说，"好，我可以聚集一堆愚蠢的人。"

Collectively they bring all of these different skills.

他们的聚集带给了我们很多不同的专业技能。

Many still gathered in collegial bands, as they had in the destitute Beijing East Village days of the 1990s.

许多人仍然聚集在合议乐队，因为他们在穷困北京东村天的20世纪90年代。

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。