diff --git a/lib/xy.h b/lib/xy.h
index a1991cf..eca9b68 100644
--- a/lib/xy.h
+++ b/lib/xy.h
@@ -9,7 +9,7 @@
  *               | BingChunMoLi <bingchunmoli@bingchunmoli.com>
  *               |
  * Created On    : <2023-08-28>
- * Last Modified : <2025-10-06>
+ * Last Modified : <2025-10-15>
  *
  *
  *                     xy: 襄阳、咸阳
@@ -122,15 +122,24 @@ xy =
 
 #define assert_str(a, b) assert (xy_streql ((a), (b)))
 
-#define xy_panic(reason)    assert(!reason)
+#define xy_throw(reason) assert(!reason)
 
-// @flavor Perl, PHP, Raku
-#define die xy_panic
+/**
+ * @depreacated 避免消极用语
+ *
+ * @flavor Perl, PHP, Raku
+ */
+// #define die xy_throw
 
-#define xy_unsupported()    xy_panic("Unsuppoted")
-#define xy_unimplemented()  xy_panic("Unimplemented temporarily")
-#define xy_unreached()      xy_panic("This code shouldn't be reached")
-#define xy_cant_be_null(p)  if(!p) xy_panic("This pointer can't be null")
+/**
+ * @depreacated 避免消极用语
+ */
+// #define xy_panic xy_throw
+
+#define xy_unsupported()    xy_throw("Unsuppoted")
+#define xy_unimplemented()  xy_throw("Unimplemented temporarily")
+#define xy_unreached()      xy_throw("This code shouldn't be reached")
+#define xy_cant_be_null(p)  if(!p) xy_throw("This pointer can't be null")
 
 
 
@@ -164,7 +173,7 @@ static void _xy_println_const_str (const char *str) {printf ("%s\n", str);}
   bool:      _xy_print_bool, \
   char *:    _xy_print_str,  \
   const char *:   _xy_print_const_str, \
-  default:   xy_panic("Unsupported type for print()!") \
+  default:   xy_throw("Unsupported type for print()!") \
 )(x)
 
 /**
@@ -179,7 +188,7 @@ static void _xy_println_const_str (const char *str) {printf ("%s\n", str);}
   bool:      _xy_println_bool, \
   char *:    _xy_println_str,  \
   const char *:   _xy_println_const_str, \
-  default:   xy_panic("Unsupported type for println()/say()!") \
+  default:   xy_throw("Unsupported type for println()/say()!") \
 )(x)
 /* @flavor Raku, Perl */
 #define say println
@@ -1341,7 +1350,7 @@ xy_detect_os ()
     }
 
   if (!(xy.on_windows || xy.on_linux || xy.on_android || xy.on_macos || xy.on_bsd))
-    xy_panic ("Unknown operating system");
+    xy_throw ("Unknown operating system");
 }
 
 
@@ -1450,7 +1459,7 @@ xy_seq_at (XySeq_t *seq, int n)
 {
   xy_cant_be_null (seq);
 
-  if (0 == n) xy_panic ("The index must begin from 1, not 0");
+  if (0 == n) xy_throw ("The index must begin from 1, not 0");
 
   if (1 == n) return seq->first_item ? seq->first_item->data : NULL;