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sand-dune相关的网络例句

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与 sand-dune 相关的网络例句 [注:此内容来源于网络,仅供参考]

In Punan area of Daqing oilfield, the total thickness of Putaohua oil layers is 10~30 m and the individual sand bodies are thin, dispersed, mixed, and transversally variable. Conventional methods can not predict individual sand body precisely.

大庆油田葡南地区葡萄花油层的总厚度薄(10~30m),单砂层具有薄、多、散、杂等特点,砂体厚度横向变化快,用常规的预测方法难以对单个砂体进行准确的描述。

The tesinic sand is used in casting iton casting steel and nonferrous metal casting.the best is to use the original of the resinic sand.

用级少的粘结剂、即可得到最大的粘结强度,对铸铁、铸钢、有色金属铸件树脂砂用原砂最理想。

From nature factor, there is arid and strong wind and plenty of sand material that derives from alleviation of rivers in Shiquanhe basin. The vegetation ecology system is very vulnerable. From human being action, the actions of secular excessive firewood and herd and disorder exploitation sandrock make origin vegetation completely destroy and alleviation including plenty of sand material whose structure is loose expose under the effect of wind force.

从自然因素看,狮泉河盆地气候干旱多风,河流冲积形成的沙源物质丰富,植物生态系统脆弱;从人类活动来看,多年的滥樵、过牧、乱采砂石等行为,将原植被破坏殆尽,使结构松散的含有丰富沙物质的狮泉河冲积物直接暴露于风力作用之下。

The degradation process of the sandy rangeland expresses the change from fixed sand to semifixed sand.

沙地草场退化过程主要表现为固定沙地向流动沙地的演化。

The analyses of social and economic development indicate that, up to 1998, the total population in Yijinholo County is 143, 949 persons, the population density is 24 persons per square kilometer, large population number results in land exploitation for food and overgrazing in rangeland. The change in temporal and spatial pattern of landuse from 1977 to 1998 demonstrates that mobile sand dunes was replaced by rangeland and woodland and partial shrubland in the middle of study area changed into rangeland and farmland from 1977 to 1987, while mobile sand dunes and rangeland transformed into shrubland and farmland in a small parts from 1987 to 1998, the above-mentioned change is proved by the change of fractal dimension index and fragmentation index at landscape and its element levels.

对近50年来伊旗社会经济发展的分析结果表明,虽然人口增长率基本上呈下降趋势,但由于人口基数较大,截至1998年底,伊金霍洛旗的人口总数达143949人,人口密度为24人/平方公里,较高的人口密度带来了更多的生存需求,使得大量的草牧场被开垦,而剩余的则严重超载。1977-1998年间伊土地利用结构总体格局变化的分析结果表明,1977-1987时段内主要是流动沙地为草牧场和乔木林地所取代,伴随着中部的部分灌木林地转换为草牧场和农地:而1987-1998时段内主要是草牧场和流沙地为灌木林地和农地特别是灌木林地所取代,而景观及各景观要素的分维度指数和破碎度指数的变化也充分证实了这一结论,虽然在前10年(1977-1987年)中大面积的灌木林被砍伐,但土地利用格局的整体变化间接地反映出该时段内荒漠化的状况正在发生逆转。

According to the characteristics of soil solidifier, soil of Ningxia Tanglai Ditch and Hanyan Ditch, sand of Zhengsha Ditch, and coarse sand of zhenbeipu were chosen to have been tested.

根据固化剂特点,选择宁夏唐徕渠、汉延渠的渠床土及征沙渠风积沙、镇北堡粗沙,进行强度试验。

Complexity and diversity of plant species, some species tend to constitute a layer of film in various communities, or dominant plant , such as Lauraceae GUI shell is thick, Chen hook camphor, Euphorbiaceae large sand leaves, Yunnan big-leaf sand, the Sterculia Sterculiaceae, etc..

植物种类复杂多样、某些种属往往构成各个群落或层片的优势植物,如樟科的厚桂壳属、陈氏钩樟、大戟科的大砂叶、云南大叶砂、梧桐科之假苹婆等。

In addition, those sand ribbons and megaripples developed on flank of stoss side of sand waves can be easily identified.

在向面所发展的沙条纹或大波痕也可以同时显示於影像上。

240 Meters core of 9 wells has been observed carefully and described delicately .it canbe divided 9 subfacies and 12 microfacies and it is considered that oil set C6 is composed ofbraided delta environment. the major type of sub-facies are deltaic front and predelta. Thesubaqueous distributary channel sand and distributary mouth bar are the major type of sand.

对长 6 油层组 9 口取心井进行岩心观察与描述,识别出 9 种层理和 12 种岩相,并结合测井资料研究,认为本研究区总体上为辫状河三角洲沉积体系,主要发育三角洲前缘亚相和前三角洲亚相,并划分了 6 种沉积微相,其储集砂体主要为三角洲前缘的水下分流河道砂体和河口坝砂体。

Good reservoir mainly includes sublacustrine fan-in-fan braided channel sand body and axial gravity flow channel sand body.

好的储集体主要有湖底扇中扇辫状水道砂体和轴向重力流水道砂体。

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