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In Portland, Maine, the land along the old train tracks near the coast has become a green belt of trails between areas characterized by housing developments and those characterized by downtown businesses.

在缅因州的波特兰市，那离海岸不远处的旧铁路延线的土地已经变成了一长条绿化带，正好处于以住宅开发为特征的区域和市中心以商业为特征的区域之间。

The preparative technique of solid lubricant is cold-press sintering method.The micro-structure , friction surface, lubricant transfer film surface of base material was characterized by SEM; XRD was used to do phase analysis. The degrees of crystallinity of pure PTFE under the different conditions of water cooling, air cooling and furnace-varying cooling were made comparison by XRD. The thermal stability of pure PTFE and solid lubricant was analyzed by DSC-TG; The composition and valence state of elements in the surface of carbon fiber ,solid lubricant before and after friction test and lubricant transfer film were characterized by XPS; The frictional property of solid lubricant was tested by pin and disk test rig .

用SEM表征原料微观结构、摩擦表面及润滑转移膜表面形貌：用XRD进行原料物相分析，及比较水冷却、空气冷却、随炉冷却三种工艺条件下的纯聚四氟乙烯树脂的结晶度；用DSC-TG分析纯聚四氟乙烯树脂及固体润滑剂的热稳定性；用XPS表征碳纤维表面、固体润滑剂摩擦前后表面、润滑转移膜表面的元素组成、价态变化；用销盘式摩擦磨损试验机对固体润滑剂进行摩擦性能测试；采用专用的台架模拟试验机对固体润滑剂镶嵌轴承套与钢轴摩擦副间的摩擦磨损性能进行测定；用莱次偏光显微镜测试固体润滑剂的硬度；用材料试验机测试固体润滑剂的抗压强度等。

Belly dance is divided into two styles, the first style originated from the ancient Egypt, it is characterized by more palace of dance, and the music is more melody-based. The other style is more based in Turkey culture, this Belly dance style is characterized by its changeable irregular moves. The music is mainly drums.

肚皮舞主要分为两大风格，第一种风格缘自于古埃及，它的特点是舞蹈更加宫廷化，音乐节奏多以埃及神秘旋律为主；另一种风格则更多地吸收了土耳其的文化营养，它的舞蹈特点是动作善变，不规则，音乐主要是以鼓点为主，突出点动练习，在跳舞的时候你会感觉到快速剧烈的动作组合，它有别于宫廷式柔美的风格。

The nanocrystals were characterized by infrared spectrum,X-ray diffraction and scanning electron microscope,which were used to characterized their structure,composition and morphology.

采用红外光谱、X射线衍射、扫描电镜表征其结构、组成及形貌，并对其电致发光特性进行表征。

Recent developments in the research on the geology and geochemistry of the newly-discovered clayey breccias at the lop of the Xiaochaka Formation in the Juhuashan, Xiaochaka and Shishuihe areas, Qiangtang Basin, northern Tibet have disclosed that mineral compositions, textures and structures, occurrences and sectional architectures of the clayey breccias agree well with those of the paleo-weathering crust in these areas. Compared with the bedrocks, the paleo-weathering crust is characterized by the leaching out of CaO and CO2, and relative enrichment of SiO2, Al2 O3, Fe2O3, K2O, Na2O, MnO and P2O5. The clayey weathered residues in the paleo-weathering crust are characterized by marked enrichment of REEs, much higher contents of LREEs than those of HREEs, markedly positive Ce anomalies and negative Eu anomalies, and a noticeable increase in other element contents besides Mo, Sn and U from the clayey weathered residues.

对最近在藏北羌塘盆地菊花山、肖茶卡、石水河等地区新发现的肖茶卡组顶部的粘土质角砾岩的地质、地球化学特征研究表明：其岩石矿物成分、结构构造、角砾层产状及剖面演化序列等与古风化壳的形成及其特征较为一致；相对于基岩，古风化壳的主量元素表现为CaO、CO2的淋失和SiO2、Al2O3、Fe2O3、K2O、Na2O、MnO、P2O5等不同程度的相对富集；古风化壳中的粘土质风化残积层的稀土元素具有明显的富集，表现为LREE含量远大于HREE的特征，存在明显的Ce的正异常以及Eu的负异常；微量元素除Mo、Sn和U外，粘土质风化残积层的其余元素含量均有明显的增加。

Following this discovery, a variety of neurotoxins were characterized and their amino acids sequences, secondary structure and tertiary structure were also characterized. These toxins are polypeptides of single chain and consist of 46-49 amino acids, cross-linked by three disulfide bridges. The ordered secondary structure has been determined on the basis of NMR studies. The dominant feature is a four-stranded anti-parallel β-sheet, linked with three loop.

随后，又有多种海葵毒素被发现，并做了氨基酸序列测定，以及二级、三级结构的分析，从已报道的海葵神经毒素的一级结构来看，大都是由46-49个氨基酸组成的单链多肽，分子量5kD左右，有6个cys残基，形成3对二硫键，它们的二级结构中不存在α螺旋结构，而是4链反向β折叠，β折叠由3个大小不同的环结构相连。

1 A German rendering of a Serbo-Croat term referring to the terrain created by limestone solution and characterized by a virtual absence of surface drainage, a series of surface hollows, depressions and fissures, collapse structures, and an extensive subterranean drainage network. 2 A type of topography that is formed on limestone, gypsum, and other rocks by dissolution, and that is characterized by sinkholes, caves, and underground drainage.

一个根据塞尔维亚－克罗地亚术语的德语，指石灰岩溶解形成的地形，特徵是：缺乏地表排水、一系列的表面空穴、凹陷和断裂、塌陷构造、和广阔的地下排水网络。2）一种地形，在石灰岩、石膏和其它岩石上溶失而形成，以灰岩坑、地穴和地下排水为特徵。

The result showed that the surface architecture and ultrastructure of I.punctatus ' gill and secondary gill lamellae were similar to those of other teleosts. The surface of gill arches and gill rakers was covered with pavement cells which were characterized by circular microridges, and secreting-holes were found among cells on the surface of gill arches. The base part of gill rakers were bigger in terms of diameter. The pavement cells' surface of gill filaments' middle part was characterized by microridges with fine lateral protuberances on both sides which were either fused or interruped, while the microridges disappeared on the pavement cells' surface on both top and base parts of gill filaments, forming dense granulated protuberances. The height and interlamellar space of secondary gill lamellae in I.punctatus were relatively higher and bigger, respectively.

结果表明，斑点叉尾鮰鳃的表面结构和微细结构与其他硬骨鱼类基本相似，鳃弓和鳃耙表面被具环形微嵴的扁平上皮细胞所覆盖，鳃弓表面细胞之间有孔洞；鳃耙基部较粗壮；中部鳃丝上皮细胞表面的微嵴两侧有细小的横突，有些微嵴出现融合或间断；端部和基部鳃丝上皮细胞表面的微嵴消失，形成密集颗粒状突起；鳃小片的高度和片间距较大。

The former fold is also called flow fold, consisting of a series parallel folds characterized by closed but well developed synclines with wide and gentle anticline in between. On thecontrary, the latter fold is characterized by completely developed anticlines with wide and gentle box shaped syncline in between.

隔档式褶皱又称流状褶皱，由一系列平行褶皱组成，其特征是背斜紧闭，发育完整，而两个背斜之间的向斜平缓开阔；隔槽式褶皱与前者相反，特征是向斜紧闭且发育完整，而两个向斜间的背斜平缓开阔，常呈箱状。

To elucidate the molecular basis of the attenuation ofDLA-EIAV in virulence thus provide theory foundation for designing HIV vaccine,thewhole genomes of DLA-EIAV and EIAV L provirus were cloned and sequenced.Aninfectious molecular clone derived from DLA-EIAV was constructed and characterized.Three DLA-EIAV/L chimeric viruses were constructed.Promoting efficacy of the longterminal repeatof the DLA-EIAV was characterized.

为了揭示我国马传贫弱毒疫苗毒力致弱及免疫保护的分子机制，为人免疫缺陷病毒及其它慢病毒的免疫预防提供借鉴，我们对马传贫驴白细胞弱毒及其亲本马强毒EIAV L株前病毒进行了全基因克隆和序列测定，比较分析了二者的前病毒基因组核苷酸序列，在此基础上构建了EIAV驴白细胞弱毒株的感染性分子克隆和三株含有EIAV强/弱毒嵌合病毒基因组的重组质粒，并对EIAV弱毒株长末端重复序列的启动子活性进行了初步研究。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。