diff --git a/ship.py b/ship.py
index a3e864a..5b8d514 100644
--- a/ship.py
+++ b/ship.py
@@ -22,4 +22,8 @@ class Ship(Sprite):
         # 在飞船的属性center中存储小数值
         self.center = float(self.rect.centerx)
         self.centery = float(self.rect.centery)
+
+        # 移动标志
+        self.moving_right = False
+        self.moving_left = False