低水位

LST reef characterized by aggradational bioherm or patch reef is generally associated with mixed clastic turbidite, siliceous limestone and mudstones reef.

低水位礁仅发育于台盆背景，以加积丘礁或点礁为特色，常与混屑浊积岩、硅灰岩、硅泥岩共生。

The field investigation indicates that there are four phases of development of carbonate breccia wedge of LST, which reflects that this area experienced at least four times of significant sea level changes in the Early-Middle Triassic.

野外调查发现研究区共发育4期低水位期碳酸盐岩角砾岩楔，说明该区在早－中三叠世至少经历了4次明显的海平面变化。

What if I operate my pump at a very low level for sump cleanout purposes?

"如果为了清理污水坑，我不得不使泵运行在低水位，这时会出现什么情况？"

Therefore, the following works was conducted: 1 Setting up different types combination failure model of ice sheet interaction with semi-breakwater, and considering different actual conditions of crushing, bending and bucking failure in the process of ice pileup when ice sheet acts on the semi-breakwater; 2 Applying analysis of non-continuous transmutation for the numerical simulation. This method is a new numerical analysis method of simulating mechanics response of dispersoid, it has a broad application prospect for the simulative questions of ice sheet moving, deforming, breaking and circumvolving after ice sheet occur pileup.

为此，具体进行： 1 建立冰排作用于半圆堤时的不同破坏类型的组合破坏模式，能够考虑到半圆型防波堤前海冰堆积过程中，由于水位的变化和堤前冰块堆积到一定程度在低水位时触底，冰排作用于半圆堤时可能会发生弯曲、挤压、压曲等不同类型的破坏的实际情形。

The part of a shore between the foreshore and the landward edge that is above high water except in the most severe storms.

由高水位向低水位流动的水流形成这一盆地向另一盆地的出流和入流。

From bottom to top, a complete terrigeous sequence in fault-depressed lacustrine basin consists of the following sequence units in turn: Sequence Boundary→Lowstand System Tract (no coast-onlap)→Trangressive System Tract (distinct coast-onlap)→Highstand System Tract being composed aggradational lacustrine mudstone with low sedimentation rate→Regressive System Tract (distinct coast-dropback)→Sequence Boundary.

断陷湖盆中一个完整的陆相层序自下而上依次由下列层序单元构成；层序界面→无湖岸上超的低水位体系域→湖岸显著上超的水进体系域→由沉积速率缓慢的垂向加积型湖相泥质岩构成的高水位体系域→湖岸显著退却的水退体系域→层序界面。

It is concluded that the variation of S,C,O isotopes and clay minerals is correlatable with the change of sedimentary environment,and that the sedimentary environment of Qianjiang Formation in Qianjiang Depression is an obstructed saline lake of inner land.

封闭盐湖中原生碳酸盐岩和粘土矿物的形成与湖泊水体的化学性质密切相关，从湖泊的低水位到高水位水体化学性质在一定范围内依次变化。

The study shows that the advantageous sandstones in the area have the following distribution characteristics: in the environment of growth faults, sandstones are mainly distributed in the downthrown block of a boundary fault; in a lowstand systems tract, sandstones are mainly distributed in lowstand wedges, slope fans, basin-floor fans, fan deltas, deltas and submarine canyons; in a transgressive systems tract, sandstones are mainly distributed in sandbars and sand-beaches; and in a highstand systems tract, sandstones are mainly distributed in deltas, fan deltas and submarine fans.

并指出有利砂体的分布特征：低水位体系域，砂体主要分布在低水位楔、斜坡扇和盆底扇；高水位体系域，主要分布在三角洲、扇三角洲、海底扇和峡谷水道。研究表明，以层序地层学理论为指导，划分层序和体系域，进而对有利砂体进行预测，对该地区油气勘探有重要指导意义。

A relative low lake level between 8660～6010 cal.yr BPwas reflected by the clayey silt sediment with the median size less than 25μam and the sandcontent less than 4%,and the Pediastrum concentration was normally low.Between 6010 and2250 cal.yr BP,the median size and sand content increased greatly,and the Pediastrumconcentration raised sharply,suggesting a relative low lake level.After 2250 cal.yr BP,boththe median size and the Pediastrum abundance abruptly declined,suggesting the lake returnedto high level and the climate changed to humid.

UG04孔硅藻记录重建的湖泊水位变化基本上支持孢粉重建的古植被和古气候：8660～7230 cal.yr BP硅藻组合以浮游类主导，浮游／底栖比达40以上，指示水位较高，气候略湿润；7230～2330 cal.yr BP浮游类硅藻丰度和浮游／底栖比降低，湖泊处于低水位，气候干旱；2330～930 cal.yr BP浮游类硅藻丰度和浮游／底栖比增加，湖泊水位升高，气候湿润。

An exchange of automatic electric steam generator, steam sets, automatic control, into the water, with steam for one, and transistors figures show that the water level gauge alarm, automatic stop-pump high level and low level Overpressure and automatically disconnect the electric components such as circuit function.

92214353#一种全自动电热交换蒸汽发生器，集蒸汽发生、自控、进水处理、蓄汽为一体，并有晶体管数字显示即高低水位超限报警、高水位自动停泵、低水位及超压自动断开电热元件电路等功能。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。