查询词典 rock bottom

Owing to long- time erosion by water, stone blocks collapse continuously at the bottom of the rock body, forming a vertical cliff.

因岩体底部被水流常年冲刷，造成岩块不断崩塌滑落，形成垂直的悬崖。

From the real practice environment, it indicates that, by using this technology, we can measure and analyze the craters and bottom?hole pattern when the conical surface of the rock is the inner or outer cone with random angle in high efficient and high precision.

实际应用表明，利用该技术能够对任意角度的内锥面、外锥面岩石破碎坑和井底进行高效率、高精度的数字化测量和分析。

It is proved that the Bottom Aquifer was composed of diluvial alluvial deposition and beds bearing gravel were mainly formed by rapid mud rock flow in fault basin...

各矿区的底含皆形成于气候干暖的新第三纪中新世，是一套在中、新生代断陷盆地内的山前洪积扇上由快速水流形成的洪积-冲积物，含砾石地层多为泥石流沉积物

However, if you swim in outdoor natural river, lake and sea, you must pay attention to the followings: water must be clean running water without any infectious disease; river bottom must be sand bottom without any sludge, riprap, growing float grass, submerged rock, sharp plants and fishes injuring human; zone must be one without busy transportation with smooth water flow.

经过卫生防疫部门检查合格的开放游泳池当然是比较理想的游泳场所，但如果在户外天然的江河湖海中游泳则必须注意：水必须是清洁、无传染病的活水；河底必须是无淤泥、乱石、丛生水草、暗礁、尖利植物及伤人的鱼类的沙底；水流平缓而非交通频繁地带。

This dissertation was focused on the research about the formation and evolution of NQB from the Late Triassic to the early middle Epoch of Jurassic Period, including integrated analyzing the characteristic of the key stratigraphic surfaces, the time of the key stratigraphy, regional rock straigraphy, biostratigraphy and chronostratigraphy, sedimentary system and depositional facies. On basis of these analysis, a tectonic evolution model have been established for NQB during from the Late Triassic to the early middle Epoch of Jurassic Period.1. After the systematic surface analysis about main stratigraphy units, we found that:(1) the bottom of Xiaochaka formation was comformity with the middle Triassic in the basin, and in the north margin it was deposited and overlapped on the different period stratigraphy before Triassic.(2) The top surface of Xiaochaka formation developed regionally karst and paleo-karst breccia, and was uncomformity with Nadigangri Formation, these things suggest that NQB in Xiaochaka depositing stage was developed from middle Triassic basin, and then an extensive regression occurred, the deposition was over and erosion come into being.(3) The lithologic assemblage, geochemistry, mixed fossils, and stratigraphy overlapping characteristic of Quemocuo Formation in early middle Jurassic indicted that the uncomformity surface was an extension-unconformity.2. Integrated analysis about stratigraphy division and correlation indicted that:(1) the paleontologic assemblage of Xiaochaka formation show its time was Carian -Norian stage of late Triassic. According to it was overlapped by late Triassic Nadigangri Formation, so Xiaochaka formation should be Carian - early Norian stage.(2) the SHRIMP Zircon U-Pb age of Nadigangri formation volcanic rocks wear vary form 216 to 205 Ma, so its time should be Norian, but maybe extended into Rhaetian Stage.(3) The age of its bottom volcanic rocks, the fossil assemblages of its middle and upper members and overlapped by lower Jurassic, indicted the age of Riganpeicuo Formation was Norian - Rhaetian stage. And the same time, the volcanic rocks geochemistry of Nadigangri and Riganpeicuo formation both reflected that they wear formed in rift tectonic settings. The lower lithologic and surface characteristic, fossil assemblages and its upper maybe was conformity with lower Jurassic, all reflected that the age of Tumengela Formation in Tumen area should be Norian - Rhaetian stage.

论文对晚三叠世—中侏罗世早期盆地的形成与演化开展了研究，包括关键地层界面特征分析、关键地层时代归属分析、区域岩石地层、生物地层和年代地层的综合对比分析、区域沉积体系与沉积相分析、岩相古地理分析，最终建立晚三叠世—中侏罗世早期羌塘盆沉积—构造动力演化模式。1、系统的对各地层单元的界面分析发现：(1)肖茶卡组底界在盆地内部与中三叠统整合关系，在盆地北缘为沉积超覆于不同时代的前三叠系之上：(2)肖茶卡组顶界面发育古岩溶角砾岩，与上覆那底岗日组为岩溶不整合接触，说明肖茶卡组沉积时期的羌塘盆地是在早中三叠世的盆地基础发展起来的，后期出现了广泛的海退事件，使盆地结束沉积并遭受风化剥蚀作用；(3)中侏罗统雀莫错组的岩性组合特征、岩石化学特征、古生物化石混积和地层的沉积超覆现象均表现出裂陷环境下形成的伸展不整合面的特征。2、综合地层划分与对比分析认为：(1)肖茶卡组古生物化石组合反映其时代为晚三叠世卡尼期—若利期，根据其上被上三叠统那底岗日组不整合覆盖，将其时代厘定为卡尼期—若利期早期；(2)那底岗日组火山岩SHRIMP锆石U-Pb年龄在216～205 Ma之间，其时代主要为若利期，可能包含有瑞替期：(3)日干配错组底部火山岩的年龄、中上部化石组合及其被下侏罗统整合覆盖，综合反映的时代为晚三叠世若利期—瑞替期，而且那底岗日组火山岩和日干配错组火山岩的地球化学成分分析反映两者均为引张构造背景下的产物；土门地区的土门各拉组的下部岩性及界面特征、化石组合和上部可能被下侏罗统整合覆盖，综合反映其时代为若利期—若利期。

The fault, stretching about 20km, with strike NE45° and dip NW, is situated in the place between the bed rock and Quaternary sediments. Fault deltidial surface and scratch can be seen at the bare bed rock of bottom wall.

之间。断裂位于台地前缘基岩与盆地南缘第四纪沉积层之间，断裂延伸约20km以上；断裂下盘基岩一侧有清楚的断层三角面和断层擦痕等，断层走向NE45。

No matter the quality of coal, the size composition and water content as well, due to the bad environment of coal production and the vibration in the process of transportation, there always has some coal and other materials left which was very easy to cake on the bottom of the mine car after unloading. If we do not clean these remaining coal and rock meal soonly, they would be heavier and solider, which would increase the weight of mine car so that decrease the effective volume of it. Then it would not only affect the transportation ability of mine car directly and make the intense condition of the transportation system, but also increase the waste of electric power, and even make substantial difficulty in starting the spacial vehicle while transporting the electrical machinery truck. So cleaning the bottom of the mine car become espectially important.

不论煤质，粒度组成及含水量如何，由于煤矿生产环境的恶劣，加之在运输的过程中的振动等原因，卸车之后总会有少量的煤炭，煤矸等易粘结的物料粘结在矿车车箱底部及邻帮若不将这些残留煤，岩粉及时清除干净，则会越积越厚，越积越结识，增加了矿车自重，使矿车的有效容积减少，它不仅直接影响着矿车的运输能力，造成了运输系统的紧张状况，而且增加了电力资源的浪费，甚至使电机车运输是空列起动发生困难，所以清理车底的问题，在煤矿就显得尤为重要。

The measurement and analysis of craters and bottom-hole pattern is an important link of drilling test and a key means of studying rock-breaking mechanism and valuating rock-breaking efficiency.

岩石破碎坑和井底的测量分析是钻头实验技术中的重要环节，也是钻头破岩机理研究和钻头性能评价的重要手段，而现有的测量分析方法精度或效率较低。

The measurement and analysis of recess by tri-cone bit teeth and bottom-hole pattern is an important link of drilling test,a key means of studying rock-breaking mechanism,and valuating rock-breaking efficiency.

以三牙轮钻头上单齿圈为对象进行试验，研究钻头破碎岩石后得到的破碎坑。

In the point of historical view, the bearing capacity of rock-socketed pile is considered mainly being related to the underlying rock of the pile bottom.

以其承载力高、沉降小、群桩效应弱等特点极大地满足了高层建筑，桥梁工程等大型建构筑物的需要。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。