free climb

基本解释

Free solo:(vb. ) to free climb without any manmade protection at all.
攀登时完全不用绳索保护徒手攀登，又叫「裸攀」。
www.rock-lizard.org
Despite intense heat. I was eventually able to climb this pitch with only one fall and felt confident that it would be possible to free climb it under cooler conditions.
不顾极度的炎热，我终于能够爬上这个绳距，只有一次坠落，且觉得信心满满能够在凉爽的天气完成自由攀登。
startip.blog.163.com
The 1996 expedition lasted nearly two months and culminated in a successful free-climb to the summit of the 20,469-foot (6,239-meter) granite spire's unforgiving East Face.
1996年的这次探险历时近两个月，探险队最终从海拔20，469英尺（6，239米）的花岗岩山锥陡峭的东侧面成功徒手攀登上峰顶。

Far from a zero-sum game, where the successes of some come at the expense of others, free economies climb spirals of mutual gain and learning.
FORBES: The Wonders of Wealth, the Path Out of Poverty
They are free to climb.
NEWYORKER: The Disconnect