We found that for every viral strategy of attack, the bacteria would adapt to defend itself, which triggered an endless cycle of co-evolutionary change.

我们发现细菌能对病毒每一种进攻策略产生适应机制以保护自己，而这又触发了病毒下一次的进化，形成无止境的循环。

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They attack all stages of the mites life cycle.

他们攻击的所有阶段的螨的生命周期。

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The flow chart of optimizing ASP climb track is designed by adjusting some parameters of Euler angle, attack angle, turbine and rocket-ramjet combined cycle work models, etc.

以涡轮和火箭冲压组合动力的工作模式以及飞行器飞行航迹角、迎角等为调参量，构造空天飞行器爬升轨迹优化流程。

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The last attempt at a truce, brokered by Mr Abbas in 2003, quickly collapsed into a cycle of attack and counter-attack.

ECONOMIST: Abbas wins a popular mandate | The

And in an election cycle where billions of dollars were spent on attack ads -- far more than ever before -- that kind of old-school retail politicking may have made the difference.

CNN: Analysis: Obama won with a better ground game