diff --git a/工具v2/database_tools.py b/工具v2/database_tools.py
index b55287af..5786f503 100644
--- a/工具v2/database_tools.py
+++ b/工具v2/database_tools.py
@@ -975,7 +975,7 @@ def setCopy(string): # 写入剪切板内容
 def RefineMathpix(raw_string): # 进一步修改mathpix得到的字符串
     puctuationsfulltosemi = {"　": " ","。": ". ","．": ". ","，": ", ","：": ": ","；": "; ","（": "(","）": ")","？": "? ","“": "``","”": "''", "【": "[", "】": "]"}
     replacestrings = {r"\\overparen": r"\\overset\\frown", "eqslant": "eq", r"\\vec": r"\\overrightarrow ", r"\\bar": r"\\overline", r"\\lim": r"\\displaystyle\\lim", r"\\sum":r"\\displaystyle\\sum", r"\\prod":r"\\displaystyle\\prod", r"\\mid":"|", r"\^\{\\prime\}":"'",r"e\^":r"\\mathrm{e}^"}
-    wrongrecog = {"雉":"锥","[粗秿]圆":"椭圆","投郑":"投掷","抛郑":"抛掷","范目":"范围","揷":"插","末见":"未见","末成":"未成","针角":"钝角","幕函数":"幂函数","末知":"未知"}
+    wrongrecog = {"雉":"锥","[粗秿]圆":"椭圆","投郑":"投掷","抛郑":"抛掷","范目":"范围","揷":"插","末见":"未见","末成":"未成","针角":"钝角","幕函数":"幂函数","末知":"未知","阀值":"阈值"}
     string = raw_string
     string = re.sub(r"\\left(?:\.?)|\\right(?:\.?)","",string) #删去括号前的\left与\right标记
     for s in puctuationsfulltosemi: