简而言之，破坏是由内部人员完成的，而不是由一些狂热的乌合之众造成的，他们不可能有如此高超的飞行技巧。

In short, destruction from the inside by insiders and not by a rag-tag group of fanatics who were incapable of flying the planes they supposedly deployed with incredible skill.

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在一块安静的场地里，57岁剃着光头留有山羊胡的戴尔博士非常显眼，正如新教徒般狂热地研究着鸟类的飞行。

In a quiet field, Dr. Dial, 57, with a shaved head and goatee, stands out with his evangelical zeal about understanding bird flight.

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