“在周期内”可以翻译为“within the period” 或 “during the cycle” ，具体使用可根据语境来选择。例如：
This task needs to be completed within the period（或 during the current cycle）.
这项任务需要在本周期（或当前周期）内完成。
The data analysis should be conducted during the cycle to track the progress.
数据分析应在周期内进行，以跟踪进展情况。