diff --git a/sv-parser-parser/src/source_text/system_verilog_source_text.rs b/sv-parser-parser/src/source_text/system_verilog_source_text.rs
index d8a4d97..d4549da 100644
--- a/sv-parser-parser/src/source_text/system_verilog_source_text.rs
+++ b/sv-parser-parser/src/source_text/system_verilog_source_text.rs
@@ -14,8 +14,11 @@ pub(crate) fn source_text(s: Span) -> IResult<Span, SourceText> {
 #[tracable_parser]
 #[packrat_parser]
 pub(crate) fn source_text_incomplete(s: Span) -> IResult<Span, SourceText> {
+    // 解析 white_space
     let (s, a) = many0(white_space)(s)?;
+    // 解析 timescale 信息
     let (s, b) = opt(timeunits_declaration)(s)?;
+    // 解析模块信息
     let (s, c) = many0(description)(s)?;
     Ok((s, SourceText { nodes: (a, b, c) }))
 }
diff --git a/sv-parser-pp/src/preprocess.rs b/sv-parser-pp/src/preprocess.rs
index 816d306..e0d1d75 100644
--- a/sv-parser-pp/src/preprocess.rs
+++ b/sv-parser-pp/src/preprocess.rs
@@ -1,6 +1,5 @@
 use crate::range::Range;
 use nom::combinator::all_consuming;
-use nom::Parser;
 use nom_greedyerror::error_position;
 use std::collections::{BTreeMap, HashMap};
 use std::convert::TryInto;
@@ -453,7 +452,7 @@ pub fn preprocess_str<T: AsRef<Path>, U: AsRef<Path>, V: BuildHasher>(
                 let mut is_cover = false;
                 if let Some(define_text) = defines.get(&id) {
                     if let Some(define_text) = define_text {
-                        if define_text.text.is_some() && define_text.text.clone().unwrap().text == "dide-undefined" {
+                        if define_text.text.is_some() && define_text.text.clone().unwrap().text == "UNKNOWN_MACRO" {
                             is_cover = true;
                         }
                     }
@@ -619,7 +618,7 @@ pub fn preprocess_str<T: AsRef<Path>, U: AsRef<Path>, V: BuildHasher>(
                     let mut is_cover = false;
                     if let Some(define_text) = defines.get(&id) {
                         if let Some(define_text) = define_text {
-                            if define_text.text.is_some() && define_text.text.clone().unwrap().text == "dide-undefined" {
+                            if define_text.text.is_some() && define_text.text.clone().unwrap().text == "UNKNOWN_MACRO" {
                                 // println!("enter dide");
                                 is_cover = true;
                             }
diff --git a/sv-parser/src/lib.rs b/sv-parser/src/lib.rs
index fa69eb2..afce2a1 100644
--- a/sv-parser/src/lib.rs
+++ b/sv-parser/src/lib.rs
@@ -210,6 +210,8 @@ pub fn parse_sv_pp(
     } else {
         sv_parser(span)
     };
+    // println!("result {result:?}");
+
     match result {
         Ok((_, x)) => Ok((
             SyntaxTree {