海拔

Sympegma regelii community, a rangeland desert vegetation, has the highest Shannon-Winner species diversity indices (1.706); the communities of Haloxylon ammodendron and Ephedra przewalskii, which have obvious feature of desert vegetation, are in the middle in species diversity indices (0.875-0.890); the communities of Calligonum mongolicum, Populus euphratica, Tamarix ramosissima and Glycyrrhiza inflata, characterized by desert forest of which saline desert bushes and saline meadows are scattered in the communities, have lowest value of the species diversity indices (0.079-0.495). 3 The structure of desert plant community is dominated by the bush layer. The species diversity indices of bush layer (0.769-1.451) is much higher than that of herb layer (0.193-0.254), and the diversity in herb layer is strongly influenced by bush layer. 4 The species diversity of desert plant communities shows a gradient of change with respect to longitude, latitude and elevation. For example, rangeland plant Sympegma regelii, with a high level of diversity indices (1.706), is in transition to desert plants Haloxylon ammodendronn community (with a low level of diversity indices of 1.379) in a longitude gradient and to saline Tamarix ramosessima community (with a low level of diversity indices of 0.376) in a latitude gradient. Calligonum mongolicum community, with a low level of species diversity (0.819), is in transition to Ephedra przewalskii (with a low level of diversity indices of 0.890) and Haloxylon ammondendron community (with the diversity indices of 0.645) in an elevational gradient.

群落Shannon-Wiener物种多样性水平表现为合头草群落最高(1.706)，具有草原化荒漠植被类型的成分；梭梭群落、膜果麻黄群落居中(0.875~0.890)，荒漠植被类型特征明显；沙拐枣群落、胡杨群落、多枝柽柳群落、胀果甘草群落较低(0.079~0.495)，荒漠林、盐地沙生灌丛及盐化草甸植被均有零星分布。3荒漠植物群落结构层次中，灌木层占居主导地位，群落灌木层物种多样性水平(0.769~1.451)远远大于草本层(0.193~0.254)，且草本层物种多样性受灌木层影响较大。4荒漠植物群落物种多样性分布格局表现为经向、纬向和海拔梯度的变化，经向、纬向变化为物种多样性水平较高的草原化植物合头草群落(1.076)向物种多样性水平较低的荒漠植物梭梭群落(1.379)和盐化植物多枝柽柳群落(0.376)的过渡，海拔梯度则呈现低水平的沙拐枣群落(0.819)到高水平的膜果麻黄群落(0.890)向低水平的梭梭群落(0.645)变化。

Africa is a continent whose main body is a tableland. Except for the low-altitude fuggy littoral areas, the altitude of most areas ranges from 800 meters to over 1,000 meters, making the climate fresh, delightful and comfortable.

非洲是一个以高原为主体的大陆，除了沿海地区海拔较低会闷热之外，大部分地区海拔都在800米至1000多米，因此气候清爽，非常舒服。

Take Zanhuang County in the eastern part of Taihang Mountains,as an example, the author chose the data of the annual mean precipitation by the hydrometric station of this county and the meteorological stations nearby from 1971 to 2000 and the longitude, latitude and altitude of each station as the study objects.

以太行山东麓的赞皇县为对象，选取1971～2000年该县水文站和周围气象站的年平均降水量，以及各站的经度、纬度、海拔高度等资料，采用回归分析方法，建立了年降水量的不同形式的空间推算模型，并利用3σ规则分析了各模型的海拔高度适用范围。

As a result of Funiu Mountains and the convergence of Tongbai Mountains here, throughout the formation of the size of peaks 172, although more than 500 meters peaks 54, such as palm Longwang, Wufengshan, Rohan Hill, Tongshan altitude are more than 600 meters; However, Baiyunshan (commonly known as Imperata blocking) the most tall, 983 meters above sea level than we are all familiar with the old Leshan百十meters higher, as the majestic mountain, Wanfeng Central humps, clouds covered the top and has always been regarded as bleeding,汝河II Jasson water.

由于伏牛山脉和桐柏山脉在这里交汇，全境形成大小山峰172座，尽管500米以上山峰54座，比如龙王掌、五峰山、罗汉山、铜山海拔都在600米以上；但白云山最为高大，海拔983米，比大家都熟知的老乐山高出百十米，由于山势雄伟，万峰环拱，白云盖顶，一向被视为泌水、汝河二水之界山。

So is the altitudinal patterns of strength of species division on the latitude gradient, from south to north, the diversity of Lauraceae plants decreased, and so is the specification strength.

在海拔梯度上，区系分化强度也呈偏峰分布格局，分化中心可能在海拔2000m左右；在纬度梯度上，从南到北，樟科植物的物种数和属数均呈调递减趋势。

On longitude gradient, from east to west, there is a slight trend of diversity of Lauraceae plants, and no obvious trend was observed on specification strength. In general, the distribution center of Lauraceae plants is in the southern part of the study area with low latitude and altitude(elevation 1500-2000 m or so).

区系分化强度与纬度呈负相关关系，区系分化中心可能在低纬度地区；在经度梯度上，从东到西，樟科植物的多样性呈轻微递减趋势，但区系分化强度无显著变化；总体上，研究区域内樟科植物的多样性分布中心集中在低纬度、中低海拔（海拔1500-2000m左右）的南部地区。

The results showed that the dominant tree species Picea jezoensis and Abies nephrolepis were distributed nearly over the whole transect,and the companion trees and most of shrubs were found in certain fragments respectively.The total number of species of the plot varied slightly,but species composition among the plots varied greatly along with the elevation variation.This trend reflected the high habitat diversity of this forest zone.

研究结果表明主要树种云杉和冷杉在整个暗针叶林带均有分布，而伴生树种和多数灌木出现于一定海拔范围内；沿海拔梯度物种数变化小而物种组成变化大则表明长白山暗针叶林丰富的生境多样性。

It is theoretically demonstrated that the influences of terrain height and orographic heterogeneity are important on the flux of surface long wave radiation over a large scale grid area.

摘要从理论和数值试验两个方面证明地形的非均匀性对网格区地面长波辐射通量的计算有重要影响，海拔高度场的区域平均值及其变差系数是影响网格区地面长波辐射通量的主要因素，仅仅用地表均匀假定下的区域平均参量（如平均海拔高度和平均温度）所计算的网格区地表有效辐射通量值与其真实值之间存在着一定的误差。

From two elevation altitude habitats of 3600 m, 2500 m at cold regions were analyzed and compared by means of light and scanning electron microscope using a new embedding method with PEG and Epon-812. Our results indicated that Papaver croceum Ldb.

采自乌鲁木齐河源区海拔3600m、2500m两种海拔高度，采用PEG和Epon-812两次包埋方法，在光学显微镜和扫描电子显微镜下叶片剖面结构进行了观察。

Was higher than those of other altitudes. Rosaceae was the family with the richest species in the seed

和巴山冷杉的种子储量在中等海拔呈现峰值；较高海拔处，糙皮桦作为优势成分之一所占的比例较

The basic concept of FOP can be summarized as to further optimize effective prescription according to the standard of curative effects and with the aid of modern science and technology and theories of traditional Chinese medicine.

其基本内涵可概括为：以确有疗效的中药复方为研究对象，以现代科学技术和传统中医药理论为技术支持，以该复方所治病证的药效响应为评价标准，以优化重组疗效更优的新复方为研究目的。

Ever since our world has been a world, native forests have been indiscriminately exploited by man.

自从我们的世界一直是世界原生森林被任意剥削人。