适应性变异最初表现为小群人发病，一些证据显示人际传播，这或许可给世界一些时间采取防御行动。

Adaptive mutation, expressed initially as small clusters of human cases with some evidence of human-to-human transmission, would probably give the world some time to take defensive action.

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她说，麦金农的黑客活动“并不是非法访问计算机时的随机试验，而是在关键时刻故意破坏美国防御系统，并且留下了证据确凿的损害。

She said McKinnon's hacking activities "were not random experiments in computer hacking, but a deliberate effort to breach US defence systems at a critical time which caused well-documented damage.

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仍无证据说明十二指肠溃疡病人中的十二指肠防御机制不完善。

There is as yet no evidence that duodenal defense mechanisms are faulty in patients who develop duodenal ulcer.

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