Caver john pollack staged his first expedition to the site in 2006 .

洞穴专家johnpollack在2006年时对此地进行了第一次探险。

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。

An expedition in february 2008 , co-led by veteran caver john pollack , comprehensively mapped and photographed the 5.9-mile ( 9.5-kilometer ) length of the little-known cavern for the first time .

2008年二月，在资深洞穴探险家johnpollack的协助带领下的一次探险，对这个5.9英里（9.5公里）长，不为人知的大洞穴进行了详细的绘图和拍摄。

Caver john pollack 's 2008 team consisted of four canadian and four american researchers aided by several laotian guides and assistants .

2008年johnpollack带领这支队伍由四个加拿大人、四个美国人及数个协助的老挝向导和助手组成。