diff --git a/core.go b/core.go
index 526b21b..7a1de66 100644
--- a/core.go
+++ b/core.go
@@ -244,13 +244,13 @@ func (tw *TimeWheel) getPosAndCircleByInterval(d time.Duration) (int, int) {
 // Date : 13:47 2023/8/4
 func (tw *TimeWheel) getPosAndCircleByCreatedTime(createdTime time.Time, d time.Duration, key any) (int, int) {
 
-	passedTime := time.Since(createdTime)
-	passedSeconds := int(passedTime.Seconds())
-	delaySeconds := int(d.Seconds())
-	intervalSeconds := int(tw.interval.Seconds())
+	passedTime := time.Since(createdTime)         // 计算从创建时间到现在经过了多少时间
+	passedSeconds := int(passedTime.Seconds())    // 从开始到现在经历的秒数
+	delaySeconds := int(d.Seconds())              // 多久之后执行
+	intervalSeconds := int(tw.interval.Seconds()) // 时间轮盘的间隔秒数
 
-	circle := delaySeconds / intervalSeconds / tw.slotCount
-	pos := (tw.currentPosition + (delaySeconds-(passedSeconds%delaySeconds))/intervalSeconds) % tw.slotCount
+	circle := delaySeconds / intervalSeconds / tw.slotCount                                                  // 计算需要走多少圈
+	pos := (tw.currentPosition + (delaySeconds-(passedSeconds%delaySeconds))/intervalSeconds) % tw.slotCount // 计算下次执行的位置
 
 	// 特殊case，当计算的位置和当前位置重叠时，因为当前位置已经走过了，所以circle需要减一
 	if pos == tw.currentPosition && circle != 0 {