于是他又成为了高速徒手攀岩的第一人。
He became the first person on earth to do speed free climbing .
我所见过丹做过的最大胆的事之一就是徒手攀岩。
One of the boldest things I ever saw Dan do was free solo rock climbing .
徒手攀岩徒手攀岩徒手攀岩