(of climbing up rocks, mountains or buildings) done with no ropes or other equipment

Free solo climbing shuns the use of ropes or other safety equipment. 徒手攀岩不使用绳索或其他安全保护设备。

With little natural protection and some big runouts, much of the route requires an almost free solo approach. 由于没有什么天然的保护，而且又有一些大的飞跃区，很多路线都需要几乎类似徒手攀岩的方式。

without ropes or other equipment

Many climbers had reached the top of El Capitan, but none had done it free solo. 许多登山者都曾登上过酋长岩，但没有一个人是徒手登峰的。

No-one is forcing him to climb free solo. 没有人逼着他徒手攀岩。

to climb up rocks, mountains or buildings with no ropes or other equipment

This mighty limestone and ice wall has been free soloed by two people. 已经有两个人徒手攀登过这座巨大的石灰岩和冰墙。

Harrington was one of the first to free solo Fitzroy, one of Patagonia's most iconic massifs. 哈灵顿是第一个徒手攀登菲茨罗伊峰的人，菲茨罗伊峰是巴塔哥尼亚最具代表性的山峰之一。

an act of climbing up rocks, mountains or buildings with no ropes or other equipment

It was one of the most dangerous free solos of all time. 这是有史以来最危险的一次徒手攀登。

This 75-storey building climb was the world's highest urban free solo. 攀爬这座75层高的楼房是世界上最高的城市徒手攀登活动。