diff --git a/mbcp/mp_math/equation.py b/mbcp/mp_math/equation.py
index 95d6483..61abf3b 100644
--- a/mbcp/mp_math/equation.py
+++ b/mbcp/mp_math/equation.py
@@ -60,6 +60,14 @@ def get_partial_derivative_func(func: MultiVarsFunc, var: int | tuple[int, ...],
     # 内部函数不注释，以防止生成文档
     if isinstance(var, int):
         def partial_derivative_func(*args: Var) -> Var:
+            """
+            @litedoc-hide
+            Args:
+                *args:
+
+            Returns:
+
+            """
             args_list_plus = list(args)
             args_list_plus[var] += epsilon
             args_list_minus = list(args)
@@ -68,6 +76,7 @@ def get_partial_derivative_func(func: MultiVarsFunc, var: int | tuple[int, ...],
         return partial_derivative_func
     elif isinstance(var, tuple):
         def high_order_partial_derivative_func(*args: Var) -> Var:
+            """@litedoc-hide"""
             result_func = func
             for v in var:
                 result_func = get_partial_derivative_func(result_func, v, epsilon)