GRE Text Completion: JiJing 1373-GRE填空机经1373题 - E7GKC6X982602U89A

Considering that space travel was science fiction only decades ago, we should be extremely reluctant to proclaim an idea forever technologically infeasible unless that idea ____________ some hard physical constraint. A. violates B. contravenes C. overcomes D. transcends E. utilizes F. introduces