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.

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。

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Years later, many consumers started seeing evidence of a more reactive and defensive approach from the company.

许多年后，消费者开始看到公司采取一种日趋倾向回应性和防卫性的对应措施的迹象。

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Obama was also forced to go on the defensive against Republican criticism that the dismal jobs outlook is evidence that he has done a poor job of handling the economy.

CNN: Obama, GOP and economic blame game