Although Dr Steffen admits that the airline industry has shown no interest in his method so far, he points out that, in principle, there should be no barriers to its adoption.

尽管史蒂芬博士承认，还没有航空公司对他的方法表现出兴趣，但他指出，这个方法实施起来是没有障碍的。

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Perhaps it is true, although not likely, that contemporary physics has at some points reached a barrier beyond which no further expansion of knowledge is possible for man.

有人说，现代物理学已经到了一个极限，人再也不可能超过这个极限来扩张知识。这一说法，尽管不大像是真的，也许是真的。

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Conclusion: No significant differences were observed for specific symptom-control end points, although improvement in survival favored HD RT.

结论：虽然高剂量放疗可以得到更大的生存优势，但在特殊症状控制上没有显著差异。

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