diff --git a/素材/正交矩阵和施密特正交化法.md b/素材/正交矩阵和施密特正交化法.md
index 4e0e6d4..45422d0 100644
--- a/素材/正交矩阵和施密特正交化法.md
+++ b/素材/正交矩阵和施密特正交化法.md
@@ -141,7 +141,7 @@ $$\begin{cases}
 \langle\boldsymbol{x},\boldsymbol{\alpha}_3\rangle = x_1 - 2x_2 + 2x_4 = 0\\
 \langle\boldsymbol{x},\boldsymbol{\alpha}_4\rangle = 2\sqrt{6}x_1 - \sqrt{6}x_3 - \sqrt{6}x_4 = 0 \implies 2x_1 - x_3 - x_4 = 0
 \end{cases}$$
-解上述齐次方程组，基础解系，得到两个线性无关的解：
+解上述齐次方程组,得到两个线性无关的解：
 $$\boldsymbol{\xi}_1=(2,1,4,0)^T,\quad
 \boldsymbol{\xi}_2=(0,1,0,1)^T$$
 正交化