diff --git a/src/DatabaseServices/Entity/Curve.ts b/src/DatabaseServices/Entity/Curve.ts
index b72fc9f21..b56e250d6 100644
--- a/src/DatabaseServices/Entity/Curve.ts
+++ b/src/DatabaseServices/Entity/Curve.ts
@@ -86,6 +86,7 @@ export abstract class Curve extends Entity
     GetDistAtParam(param: number): number { return; }
     GetDistAtPoint(pt: Vector3): number { return; }
     GetParamAtPoint(pt: Vector3, fuzz = 1e-6): number { return; }
+    //直接提供点在线上的参数,不管点有没有在线上
     GetParamAtPoint2(pt: Vector3, fuzz = 1e-6): number { return this.GetParamAtPoint(pt, fuzz); }
 
     GetParamAtDist(d: number): number { return; }