diff --git a/120-3.py b/120-3.py
index b240434..0de11a5 100644
--- a/120-3.py
+++ b/120-3.py
@@ -4,7 +4,7 @@ x1, x2 = 3, 6
 def fx(x):
     return x/(4+x**2)
 
-# n等分，x1到x2的区间，type=1表示梯形法，type=2表示辛普森法
+# n等分参数，x1到x2的区间，type=1表示梯形法，type=2表示辛普森法
 def CompositeNewtonCotes(n, type):
     if type == 1:
         h = (x2 - x1) / n
@@ -23,5 +23,9 @@ def CompositeNewtonCotes(n, type):
     
 
 if __name__ == "__main__":
-    print("Composite Trapezoidal Rule: ", CompositeNewtonCotes(8, 1))
-    print("Composite Simpson's Rule: ", CompositeNewtonCotes(4, 2))
\ No newline at end of file
+    # 复合梯形公式，点数为n+1
+    print("复合梯形公式\n", CompositeNewtonCotes(8, 1))
+    # 复合辛普森公式，点数为2n+1
+    print("复合辛普森公式\n", CompositeNewtonCotes(4, 2))
+
+