Migration could reduce the amount of disease as infected animals are left behind to die, but changes in migration might prevent such natural purging of infections, the review says.

这份综述说，随着被感染的动物掉队死亡，迁徙可能减少疾病数量，但是迁徙的变化可能阻止这种天然的防止感染的措施。

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Simply stated, a migration from Version 3.5 will take the most amount of planning, coordination and effort.

简单地说，从 V3.5 中迁移将需要最详尽的计划、最周密的考虑和最大的工作量。

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In general, refactoring should be part of the normal development process (in fact, some amount of refactoring should naturally occur during the "Code Migration" stage).

通常，重组应是正常开发过程的一部分(事实上，在“代码迁移”阶段，一定数量的重组应是自然发生的)。

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