Repeat in stages, each stage renaming at the declaration, and changing references until the next assignment.
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repeat in stages
分阶段重复
以上为机器翻译结果，长、整句建议使用 人工翻译 。
These stages often do not follow in sequence, and commonly repeat and overlap.
下列阶段往往不会按顺序先后发生，而是重复交叉。
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