底面

It contains cofferdams bottom manufacture, installation, level transmition, precise positioning, sinking to the rock and finishing measure.

包括大型双壁钢围堰的底节制作、拼装接高、基准面传递、精密定位着床、吸泥下沉至着岩、清基及竣工测量。

There are some little cells with diameter 4.5~8.3 μm in molecular layer. Purkinje cell is like a pear in Purkinje cell layer, it's base width is 17.8~25.6 μm, it's height is 18-30 μm. There are lots of rough endoplasmic reticulum, free ribosome, mitochondria, golgi body, lysosome, etc. in Purkinje cell. Granular cell ratio of nucleus to cytoplasm is high in granular layer.

分子层含少量小细胞，细胞大小在4.5~8.3μm； Purkinje细胞层细胞体呈梨状，底宽在17.8~25.6μm之间，高约为18~30μm，细胞中含有丰富的粗面内质网、游离核糖体、线粒体、高尔基体、溶酶体等；颗粒层的颗粒细胞细胞核大，细胞质少。

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。