diff --git a/sim_scenes/sci_pop/sun_earth_moon.py b/sim_scenes/sci_pop/sun_earth_moon.py
index 78d5c3164e8f1ae0a83edd8e0bc775294779137e..4f1cf42ca145586e070772b3ba251e1924d3cbae 100644
--- a/sim_scenes/sci_pop/sun_earth_moon.py
+++ b/sim_scenes/sci_pop/sun_earth_moon.py
@@ -88,6 +88,7 @@ class SunEarthMoonSim(UniverseSimScenes):
         dt = time_data.get_datetime(self.start_time)
         # if dt.year == self.current_year + 1:
 
+        # TODO: 调试用
         if dt.month < 12:
             UrsinaConfig.run_speed_factor = 200 * 24
         elif UrsinaConfig.run_speed_factor > 20 * 24:
@@ -195,6 +196,9 @@ class SunEarthMoonSim(UniverseSimScenes):
             time_data = TimeData(seconds, "seconds", seconds)
 
         dt = time_data.get_datetime(self.start_time)
+        # 月球围绕地球转一圈的时间，即月球真正的公转周期是一个恒星月，时间是27.5天 。
+        # 而我们一般用从地球上看，月球完成一次朔望更替为一个月，叫一个朔望月，时间是29.5天。
+
 
         aspect_ratio = window.aspect_ratio
         position, origin = (0.5 * aspect_ratio - 0.15, -0.45), (-0.05, 0.1),
@@ -208,7 +212,8 @@ class SunEarthMoonSim(UniverseSimScenes):
         #                                   close_time=-1)
 
         self.text_panel.text = "\n日期时间：\n" + dt.strftime('%Y-%m-%d %H:%M') + "\n\n" + \
-                               "天数:" + str(round(total_days, 3))
+                               "天数:" + str(round(total_days, 2))  + "\n\n" + \
+                               "月数:" + str(round(total_days/29.5, 2))
                                # "运行速度:" + str(UrsinaConfig.run_speed_factor) + "\n" + \
                                # "天数:" + str(round(total_days, 3))