查询词典 barchan

The sand dunes analyses data have shown they mainly consist of well sorted, symmetry skewness and find sands, and the kurtosis peak is narrow or very narrow. There are abundant impacts of mechanic process on the surface of quartz grains. The traces of eolian process often superpose on the traces stamped by river and beach processes. The dish--shaped concavities and mechanic pits are the most common surface textures, but the barchan concavities and curved grain edges are indicated the marks by eolian environment. The heavy minerals assemblages of coastal dunes are dominated by relatively high specific gravity which have stable chemical properity suggesting the mordern high dynamic environments of coast area. The depositional structures of coastal dunes are typified by corss--bed sets composed of steep foreset laminates and gentle windward dipping sets. It also contains some shell fragments and strong worn foraminiferal tests that are impossibly found in inland desert. On the other hand, the sandy deposits of the continental shelf of East China Sea are with wide range of grains, and the depositional pattens are quite complicated.

海岸沙丘是晚全新世以来相对稳定的海平面背景下的海岸带风成堆积，其沉积特征是以细沙为主，分选好，搬运方式以跃移占绝对优势，偏度上近对称，峰态窄到很窄；石英颗粒表面机械作用形态丰富，风成作用形态叠加于河流和海滩过程形态之上，碟形坑和撞击麻点是最为常见的表面形态，而新月形坑和曲脊是其指示性的特征标志；沙丘沙重矿物以化学性质稳定、比重较大的种类为主，反映了海岸带目前的高能动力环境；海岸沙丘沙的沉积构造以高角度前积层和低角度顶积层组成的交错层理为典型特征，同时还含有少量内陆沙漠所没有的少量贝壳碎屑和强烈磨损的有孔虫壳体。

It is known for its dramatic dunes, including the crescent-shaped barchan dunes shown here, some of which can reach 100 feet (30 meters) high and 1,200 feet (370 meters) wide.

其实这是著名的戏剧性的沙漠，它包括新月形的沙丘显示在这里，其中几个可能达到30米高和370米宽。

A large barchan (crescent-shaped) dune, in a region where some dunes have been observed shrinking over several years.

大型新月形沙丘在一个地区，那里的一些沙丘已经观察几年缩小。

It is known for its dramatic dunes, including the crescent-shaped barchan dunes shown here, some of which can reach 100 feet (30 meters) high and 1,200 feet (370 meters) wide.

这里因有着壮观的沙丘而知名，比如图中的这些半月状的弧形沙丘，有些沙丘甚至可高达100英尺(30米)，宽达1，200英尺(370米)。

It is known for its dramatic dunes, including the crescent-shaped barchan dunes shown here, some of which can reach 100 feet (30 meters) high and 1,200 feet (370 meters) wide.

纳米布沙漠因它壮丽的沙丘闻名于世，包括像照片显示的这种新月形的沙丘，其中一些沙丘可以达到100英尺（30米）高和1200英尺（370米）宽。

Another kind of dunes are barchan dunes.

另一种是新月形沙丘类型沙丘。

Parabolic dunes are the opposite of barchan dunes.

抛物型沙丘是新月形沙丘相反。

The width effects of dune are studied and the reason that the barchan dune is formed on the lee slope of dune is given.

但对于背风坡形状的形成，特别是对新月形沙丘，这样一种沙漠、戈壁上最常见的相对稳定的横向沙丘的背风坡新月形落沙坡的形成和保持，无有完整的理论分析，只是简单地认为其坡度不能大于沙子的摩擦角而已。

Patterns in Nature: Sand Strange creatures slithering up from the Empty Quarter desert floor in the Arabian Peninsula are really a network of barchan dunes—sculpted by winds that over time strike the sand from a consistent direction.

位于阿拉伯半岛一种奇怪的不稳定的滑动来自Empty Quarter沙漠是真正的网络的新月形沙丘――造型被风吹的长期打击沙丘来自一致的方向。

Patterns in Nature: Sand Strange creatures slithering up from the Empty Quarter desert floor in the Arabian Peninsula are really a network of barchan dunes—sculpted by winds that over time strike the sand from a consistent direction.

奇怪的动物不稳定的滑动从空季度沙漠基底在阿拉伯半岛真的是一个网络新月形沙丘――雕塑被风，随着时间的推移冲击沙子从一个恒定不变的方向。

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。