这称为循序执行，也是程序流程的预设方向。

This is called sequential execution and is the default direction of program flow.

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另外一个循序执行的方法是，当程序码遇到条件结果时，将程序流程转送到指令码的另一个部分。

An alternative to sequential execution transfers the program flow to another part of a script as a result of conditions that a script encounters.

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一般来说，环境协定要取得成功，就必须有一个广泛的框架、明确的目标和循序渐进的执行办法。

In general, successful environmental agreements require a broad framework, clear targets and a gradual approach to implementation.

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