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.

占總面積66.3%的山區(qū)旱坡地是三峽庫區(qū)江河泥沙的主要來源中国国产精品无码理论片，為了控制三峽庫區(qū)水土流失欧美日韩美女一区，科技人員對三峽庫區(qū)坡耕地土壤侵蝕進行了大量的調(diào)查研究欧美一级AA在线观看，但對于構(gòu)建不同植被類型下的水土流失特征及其生態(tài)效應(yīng)研究還停留在定性描述的階段真实迷奸在线观看。

Because a planation surface is the ultimate result of topographical evolution, accompanying river systems and gorges have aged topographical character.

由于夷平面是地貌演化過程中的老年階段，其伴生的河谷也必然為老年河谷国产日韩欧美主播。

The Greater Blue Mountains Area consists of 1.03 million ha of sandstone plateaux, escarpments and gorges dominated by temperate eucalypt forest.

點的描述：大藍(lán)山地自然保護區(qū)占地103萬公頃，內(nèi)有砂巖高原欧美黄色一级久久片、懸崖和峽谷地貌99久久播放视频，大部分被溫帶桉樹林覆蓋。

In Vision of Excess, Gorges Baitaille proclaims that production and conservation of goods are indispensable ways to maintain social order and thus designate the negative position of the pleasure principle.

在《過度》這一本書當(dāng)中亚洲欧洲性爱，巴塔耶認(rèn)為生產(chǎn)和貨物的堆積已成為維護社會次序不可或缺的手段99色免费看视频，因此快樂原則成為負(fù)面的含義。

Finally , we produced moderate heat portland cement which could be well used in Three Gorges Project.

最后給出了一種適合三峽工程的中熱硅酸鹽水泥在线看一级片视频软件。

In such narrow, precipitous gorges,it's by far the easiest way to get around.

在如此狹窄陡峭的山谷中无码观看黄三级网站，這種簡易的交通方式顯得尤為便捷

Their ancesters began to sail primitively over the river and wrote down the first chapter of Three Gorges navigation.

正是他們開始了長江上最原始的航行，寫下三峽航運最初的篇章丝袜美女人人摸人人操。瓊心里的那種原始的英國氣息被徹底攪動了免费观看黃色A片一级视频快进。

In the territory of Xueshan town, there are high mountains and steep inclines as well as valleys and gorges everywhere, with its general topography inclining to Pudu River from southeast to northwest.

雪山鎮(zhèn)所轄的范圍內(nèi)，到處都有高大的山脈和陡峭的懸崖免费观看黄色视频，整體地形由東南傾向西北人人干操操操插，一直延伸到普度河。

In the territory of Xueshan town, there are high mountains and steep inclines as well as valleys and gorges everywhere, with its general topography inclinting to Pudu River from southeast to northwest.

在雪山鎮(zhèn)范圍內(nèi)偷拍偷窥网，到處都有高高的山峰和陡峭的斜坡色视频网站观看，也有山谷和峽谷，它的地勢大體上是自東南向西北方向傾斜至普都河，最高點和最低點分別為高度4247米的驕子雪山和海拔為865米的普都河国产伦频网，這兩者之間的相對間隙海拔高度為3382米国产日韩入口一区二区三区，鎮(zhèn)政府坐落于海拔2650米的地方。

Large quant IT ies of investments and manpower were called for in the construction of the Three Gorges project.

在三峽項目的建設(shè)中需要大量的投資和勞動力精品久久久一级毛片。