This flow may either be conditional or unconditional; that is, there may be rules that specify conditions that must be met in order for the next activity in the process to be executed.
It greatly enhances the build process by letting you control program flow with looping constructs and conditional logic.
它让您用循环构造和条件逻辑控制程序流，极大地增强了构建过程。
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The palette also includes basic programming constructs that allow for controlling the flow, such as decision points for conditional execution, and loops for process cycles.