He is defying gravity with his incredible stunts.

他用惊人的特技违抗了重力。

I was keen to experience the excitement of defying gravity.

我渴望体验对抗地球引力的快感.

That was a half century ago, when men first squeezed into their machines and, defying gravity, rode into a new dimension of human experience.

半个世纪前的当年，当人们第一次钻进他们制造的机器里公然反抗地心引力时，人类的探索之旅开始了新纪元。