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1·Discuss the characteristics and the application of nc caver, and its structure and main functions.

讨论了数控雕刻机的特点与应用，阐述了雕刻机的控制原理、组成以及主要功能。

2·A caver is dwarfed by calcite columns that stretch some 50 feet (15 meters) to the top of Tower Place in Lechuguilla cave.

一个洞穴探察者是相形见绌方解石列舒展约50英尺(15米)，顶部的塔发生在墨西哥龙舌兰洞穴。

3·Methods Analysing the diagnosis and treatment effect on 9 cases with portal caver cavernoma aged 1~11, 7 cases were followed up.

方法 对在我院确诊的9例1～11岁门脉海绵样变患儿的诊断和治疗效果进行分析，并追踪预后。