底面

The other way is to turn the sheet on its short dimension,feeding the other long edge to the grippers,after backing-up,the sheet is cut in half at its short dimension.

在没有特别说明时，半张纸式是反映横转式。另一个翻转纸张的方法是沿着纸的短边，印底面时用另一长边作夹牙边。印后，在短边当中切开。

The alveolar cavities were made of single-layer capillary networks and the alveolar cavities varied in size. The alveolar cavities were half-hollow spheres, concave to outside and base to inside.

单层毛细血管网围成肺泡腔，腔体大小不一，伸展状态较好的肺泡呈现出凹面向外，底面朝内的半空心球状结构。

Based on the previous research about the ice-harvester tank, the paper further investigates the properties of tank at ice-filling and ice-melting, notifying the relation between the two rest angles, bringing out the method to optimize the tank"s dimensions, resolving the ice-filling problem according to the connection between the icepack and the tank"s underside, analyzing the ice-melting problem with discharge capacity.

本文在国内外有关片冰机蓄冰槽研究成果的基础上，对蓄冰槽在蓄冰和融冰时的特性做了进一步的研究，揭示了两个安息角的关系，提出了优化蓄冰槽尺寸的方法，根据冰床与蓄冰槽底面接触的情形求解蓄冰问题，用融冰能力分析融冰问题。

Stone Flower: moss plants, the growth characteristics similar to skin and stone, leaf-shaped, while the stones bear towel, the bottom black, white surface, and attached to the stone, it seems one were blossoming flowers blooming late,"Stone Flower."

石花：苔藓类植物，生长特性与石皮相似，叶片状，紧巾石头而生，底面黑色，表面白色，附在石头上，似一朵朵花儿盛开，故名&石花&。

What's the relationship between these two undersides?

两个底面有什么关系？

Compare the first one: what's the relationship between their undersides and their heights?

先比一比第一组，这个圆柱和这个圆锥的底面和高有什么关系？

It has two undersides and a flank

有两个底面，一个侧面。

The distance between the two undersides is called the heights of cylinder.

什么叫圆柱体的高？（圆柱两个底面之间的距离叫做高。

There are many problems in the carling forming and unloading processes such as expand and shrink of U section wall, the torsion of U section and the warp of carling head.

针对纵梁冲压成形及卸载后发生的U型截面侧壁的外扩、内缩、扭转以及纵向端头翘曲等问题，首先分析了纵梁的成形及回弹变形机理，利用仿真分析软件KMAS进行了数值模拟并采用半解析、半实验方法研究了纵梁底面翘曲，找出模具结构的最佳方案。

There are many problems in the carling forming and unloading processes such as expand and shrink of U section wall, the torsion of U section and the warp of carling head. These problems are concerned by the carling factories and do not solved for a long time. The mechanism of the carling forming and spring back is analyzed. The carling forming and spring back processes are simulated by KMAS software. The warp of carling underside is researched by half analytic and half experiment method and the best scheme is found by this method.

针对纵梁冲压成形及卸载后发生的U型截面侧壁的外扩、内缩、扭转以及纵向端头翘曲等问题，首先分析了纵梁的成形及回弹变形机理，利用仿真分析软件KMAS进行了数值模拟并采用半解析、半实验方法研究了纵梁底面翘曲，找出模具结构的最佳方案。

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。