It was getting dark,I found a car stuck in a pool by the side of the road .

天黑了，我發(fā)現(xiàn)我的車陷在路邊一個洼地里gs0431.com。

They found that the domes stand out as bright protrusions against the dark basaltic rock of the surrounding plains, and that many exhibit central depressions.

他們發(fā)現(xiàn)国产日韩在线亚洲色视频，相對周圍平原上的黑暗玄武巖，這些泥圓頂呈現(xiàn)為明亮的突出物日韩二区，突顯出中央的洼地尤物视频欧美性爱。

The experiment was carried out to study the productivity and characteristic of four grasses in karst peak-cluster billabong, northwestern Guangxi.

在桂西北峰叢洼地研究了4種牧草的生產(chǎn)力大小和形成特點av天堂日韩，結(jié)果表明：桂牧1號象草Pennisetum americanum×P。

"It's remarkable what passes through Cheyenne Bottoms," he said in a recent interview.

在最近的一次采訪中，他說道：值得注意的是飛經(jīng)夏延洼地的都是些什么鳥久久精品视频大全。

Which shows that the grade of water resources development is badly low in Longhetun, measures of water development to diverse types of plowland according to the difference in south- or north-slope and the bottom of the depression.

結(jié)果表明龍何屯水資源的利用程度極低免费久久一级欧美大黄，存在洼地南北坡和洼地底的差異黄色无码视频在线免费观看，提出針對不同耕地類型国产淫乱视频、不同作物種類的水分開發(fā)利用方式。

Lop Nur is now the lowest in the north, one of the biggest depression that was once a center of stagnant water in the Tarim Basin, originated in ancient Tianshan, the Kunlun Mountains and the Altun Mountain watershed, stream into Norbu depressions formed lakes.

現(xiàn)在羅布泊是位于北面最低黄色网站快操我、最大的一個洼地亚洲国品网站，曾經(jīng)是塔里木盆地的積水中心，古代發(fā)源于天山99视频10精品视频在线、昆侖山和阿爾金山的流域少妇黄片AAA一区二区三区，源源注入羅布洼地形成湖泊。

Right below it there was an exceedingly small hollow of green turf, hidden by banks and a thick underwood about knee-deep, that grew there very plentifully; and in the centre of the dell, sure enough, a little tent of goatskins, like what the gipsies carry about with them in England.

在巖壁的正下方有極小一塊長有綠色草皮的洼地国产日本视频一区二区观看，被沙汀和高及膝部的茂密的矮樹所掩蓋中国一级婬片A片AAA免费。洼地中間果然有山羊皮做的小帳篷，有點像吉卜賽人在英國流浪時攜帶的帳篷欧美一级操b视。

Sand and clay sediments are studied by means of 137Cs tracing test in typical grass-covered peak cluster depression in Maolan, southern Guizhou.

在貴州茂蘭峰叢洼地區(qū)的工程碑草地洼地典型小流域進行了洼地沉積泥沙137Cs示蹤分析研究国产在线无码精品麻豆不卡。

According to the 137Cs concentration distribution along a typical profile A-1, the sediment accumulation rate and the natural surface soil erosion rate are respectively 16.6t/km^2a and 45.95t/km^2a, which shows that about 63.88% of the eroded surface soil is removed by way of underground loss. The relative contribution ratio of surface soil loss and underground soil loss are respectively 70.13% and 29.87%. By comparison to the utmost soil formation rate 13.51t/km^2a in Maolan, the risk of soil erosion in the Engineering Monument grass-covered depression is higher.

2根據(jù)草地洼地典型堆積農(nóng)耕地土壤剖面A-1的137Cs濃度分布特征，1963年以來的流域平均堆積泥沙數(shù)量是16.6t/km^2a国产天天操，流域平均土壤侵蝕速率為45.95t/km^2a欧美日韩国产综合一区二区三区，約占侵蝕產(chǎn)沙數(shù)量63.88%的泥沙以地下流失的形式散失；(3)草地洼地小流域內(nèi)地面土壤流失與地下土壤流失的相對貢獻率分別是70.13%和29.87%草草影院欧美04一区二区三区；(4)以茂蘭地區(qū)最大成土速率為依據(jù)推算出的允許土壤侵蝕量是13.51t/km^2a日韩高清视频在免费线，草地洼地的土壤侵蝕危險程度極高免费在线观看青春草。

Hence measure was put forward to regulate the agricultural structure in Longhetun that high efficiency crop using luminous energy should be selected on the south slope and the bottom.

鑒于此，提出調(diào)整龍何峰叢洼地農(nóng)業(yè)種植結(jié)構(gòu)www.香蕉网，在洼地南坡和洼地底盡量選擇光能利用率高的作物黄大色大片免费久久。