您要查找的是不是：
- earth level surface change 大地水准面变化
- The set of points is called a level surface. 这种点的集合被称为等位面。
- Figure 7-12 shows a body of mass m on a level surface. 图7-12表示水平面上质量为m的物体。
- Products intended to stand should be stable when placed on a level surface. 设计为站立的产品;将其放置在一个水平面上必须是稳定的.
- Set this refractometer on a solid and level surface of a workbench, etc. 比如放它在坚实水平的工作台上等等。
- The velocity of land surface change on north of seacoast(Lianyungang sea coast) in Jiangshu province is small. 而江苏海岸带北端（连云港岸段）的地面升降性质是接近于稳定的。
- A flat or level surface. 水平面平坦或水平的表面
- Figure 7-13(a) shows a man standing on frictionless roller skates on a level surface, facing a rigid wall. 图7－13（a）表示一个人穿着无摩擦的有轮滑冰鞋站在水平平面上，面对着一堵坚硬的墙。
- Figure 2-1 represents a flat, rigid object of arbitrary shape on a level surface having negligible friction. 图2－1表示一个任意形状的扁平刚体，放置在无摩擦的水平面上。
- A dried, leveled surface can be painted or wallpapered. 已干燥平整的墙面可以贴墙纸或粉刷油漆。
- Barchan dunes are produced by strong winds blowing across a level surface and are crescent shaped. 强风吹过表面形成弧形沙丘而就是新月形。
- Asymmetric dual-angle milling cutter used to point chutes, and inclined spiral groove, level surface. 不对称双角铣刀用来铣削角度槽、斜面及螺旋沟、台阶面。
- Because change of volume reflected eroding process of watershed and surface change reflected change of topography surface, this model described relationship between watershed topograph and erosion. 由于相对体积变化反映了流域遭受侵蚀的过程，而表面积变化体现的是地形表面的变化，因而此关系模型同时表述了流域地形与侵蚀之间的关系。
- Check to make sure the engine is mounted on a level surface so that the crankcase is free of tension. 查?定引擎安?在平?被板上以便曲?箱免於?力。
- Select a location near the center of the water piping system. It must be installed indoors and in a vertical position on a level surface. 选择靠近水管系统中心的位置。必须在室内的水平地面上立式安装。
- The surface that the engine is mounted on must be on an even plane (i. E., A flat and level surface) so that there is no strain on the engine itself. 引擎安?必?是固定在一正平面背板上(即,平和平?表面)?定引擎外?有受到?力。
- The process of erosion and deposition in which a nearly level surface is produced, as by streams, wind, or ocean currents. 均夷作用象由河流、风或洋流引起近似平坦的表面的侵蚀和沉积过程
- This is a market condition no force on earth can change. 这一市场情况任何力量也改变不了。
- Our pilotless rocket enters the track of the earth. 我们把一个无人驾驶的火箭送入了地球的轨道里。
- Select a location near the fixture that this water heater will supply. The water heater must be installed indoors and in a vertical position on a level surface. 选择这个热水器所要供水的用具附近的位置。这个热水器必须在室内的水平地面上立式安装。
