查询词典 headwater erosion

The study of soil degradation has become the focus of the 21st century inter- national pedology, agronomy, hydrology, environmental science and soil erosion science, however, a lot of theoretical problems and course mechanism about soil degradation are uncertain hitherto.

土壤退化研究已成为21世纪国际土壤学、农学、水文学、环境科学及侵蚀学科关注的热点，但是直到今天为止有关土壤退化的许多理论问题及过程机理尚不清楚。

Geological structure in the draft is near the slow uplift area, strongly affected by long-term erosion of the role of the terrain has become peneplain, 1500-2500 m above sea level.

在地质构造上属挽近缓慢隆升区，受长期强烈的剥蚀作用，地形已趋准平原化，海拔1500—2500米。

The data from sediments, tectonic and erosion rate show that this original peneplain was formed in the end of the Oligocene Epoch, a long crust steady phase after the first episode of Himalaya tectonic movement.

这个古老的原始夷平面形成于渐新世末，即喜马拉雅还动第一幕－冈底斯运动之后的地壳长期稳定时期，与青藏高原山顶夷平面以及华北北台期夷平面形成时间相当。

Subaerial erosion occurs often with reduction to a peneplain.

陆上侵蚀常夷平成准平原。

Fill Hill and the heli - Longshoushan between the Hexi Corridor of Qilian fold belt of the Piedmont depression Plain, the rest is Alxa - Mazongshan floor, a long period of steady state, topography tends to peneplain of the northeast - southwest or east-west to the dry hills and mountain basin erosion appears intricate.

补连山与合黎—龙首山之间的河西走廊为祁连山褶皱带的山前拗陷平原，其余为阿拉善—马鬃山地台，长期处于稳定状态，地形趋于准平原化，东北—西南向或东西向的干燥剥蚀山丘与山间盆地错综出现。

Level of vast lakes had been base surface for incision in Early Miocene from (24.1±0.6)Ma to(14.5±0.5) Ma, and lakes and top lacustrine deposits of Wudaoliang Group became base surface for erosion and peneplanation since Late Miocene, which formed planation surface or peneplain of the Tibetan Plateau.

中新世早期(24.1±0.6~(14.5±0.5Ma)以古大湖的湖面为侵蚀基准面，经过隆起区剥蚀夷平和长期湖相沉积，在高海拔环境下形成早期夷平面。

METHODS: A total of 129 gastric mucosa biopsies and its corresponding serum specimens were collected from patients with superficial gastritis (n=30), gastric ulcer or erosion (n=35), atrophic gastritis (29), and gastric cancer (n=35). The expression of PGC in the gastric mucosa was detected by immunohistochemistry, and the concentration of serum pepsinogen A and pepsinogen C were determined by enzyme linked immunosorbent assay.

129例胃黏膜活检组织及其血清标本（浅表性胃炎30例，胃黏膜糜烂溃疡35例，萎缩性胃炎29例，胃癌35例），采用免疫组织化学染色检测胃黏膜标本中PGC的表达情况；采用酶联免疫吸附实验检测血清PGA和PGC含量。

Wind-erosion is one of basic processes to mold the physiognomy landscape pattern and it is a process of desertification.

中文摘要：风蚀是塑造地貌景观格局的基本过程之一，也是土地荒漠化的一个过程。

The theories of erosion cycles and physiographic stages are important theories of geomorphology.

侵蚀循环理论和地文期理论是地貌学的重要的基本理论。

In this paper,taking several typical control types of Three Gorges reservoir area as the example,the effect factors, characteristics and rules of the soil erosion and its diversification of the soil physical and chemical properties under different vegetation types were studied by large numbers of pilot field survey and positioning observation.

占总面积66.3%的山区旱坡地是三峡库区江河泥沙的主要来源，为了控制三峡库区水土流失，科技人员对三峡库区坡耕地土壤侵蚀进行了大量的调查研究，但对于构建不同植被类型下的水土流失特征及其生态效应研究还停留在定性描述的阶段。

The use of the web to spread fears that flicking the switch on the LHC could create a Black Hole that could swallow up the Earth particularly concerned him, he said.

他说，使用互联网散布恐慌说启动LHC会生成一个可能吞噬地球的黑洞的做法让他感到忧虑。

Not a single word have I written down.

我一个字也没有写下来。