diff --git a/.DS_Store b/.DS_Store
deleted file mode 100644
index 684d7c7..0000000
Binary files a/.DS_Store and /dev/null differ
diff --git a/.obsidian/plugins/obsidian-excalidraw-plugin/manifest.json b/.obsidian/plugins/obsidian-excalidraw-plugin/manifest.json
index f435d35..44006a8 100644
--- a/.obsidian/plugins/obsidian-excalidraw-plugin/manifest.json
+++ b/.obsidian/plugins/obsidian-excalidraw-plugin/manifest.json
@@ -1,12 +1,12 @@
-{
-  "id": "obsidian-excalidraw-plugin",
-  "name": "Excalidraw",
-  "version": "2.9.2",
-  "minAppVersion": "1.1.6",
-  "description": "An Obsidian plugin to edit and view Excalidraw drawings",
-  "author": "Zsolt Viczian",
-  "authorUrl": "https://www.zsolt.blog",
-  "fundingUrl": "https://ko-fi.com/zsolt",
-  "helpUrl": "https://github.com/zsviczian/obsidian-excalidraw-plugin#readme",
-  "isDesktopOnly": false
-}
+{
+  "id": "obsidian-excalidraw-plugin",
+  "name": "Excalidraw",
+  "version": "2.9.2",
+  "minAppVersion": "1.1.6",
+  "description": "An Obsidian plugin to edit and view Excalidraw drawings",
+  "author": "Zsolt Viczian",
+  "authorUrl": "https://www.zsolt.blog",
+  "fundingUrl": "https://ko-fi.com/zsolt",
+  "helpUrl": "https://github.com/zsviczian/obsidian-excalidraw-plugin#readme",
+  "isDesktopOnly": false
+}
diff --git a/.obsidian/plugins/obsidian-git/obsidian_askpass.sh b/.obsidian/plugins/obsidian-git/obsidian_askpass.sh
old mode 100755
new mode 100644
diff --git a/书籍/力学书籍/力学/多体系统动力学（第2版）＝DYNAMICS OF MULTIBODY SYSTEMS(SECOND EDITION) (刘延柱 戈新生 潘振宽) (Z-Library)/auto/多体系统动力学（第2版）＝DYNAMICS OF MULTIBODY SYSTEMS(SECOND EDITION) (刘延柱 戈新生 潘振宽) (Z-Library)_origin.pdf b/书籍/力学书籍/力学/多体系统动力学（第2版）＝DYNAMICS OF MULTIBODY SYSTEMS(SECOND EDITION) (刘延柱 戈新生 潘振宽) (Z-Library)/auto/多体系统动力学（第2版）＝DYNAMICS OF MULTIBODY SYSTEMS(SECOND EDITION) (刘延柱 戈新生 潘振宽) (Z-Library)_origin.pdf
deleted file mode 100644
index fd33797..0000000
Binary files a/书籍/力学书籍/力学/多体系统动力学（第2版）＝DYNAMICS OF MULTIBODY SYSTEMS(SECOND EDITION) (刘延柱 戈新生 潘振宽) (Z-Library)/auto/多体系统动力学（第2版）＝DYNAMICS OF MULTIBODY SYSTEMS(SECOND EDITION) (刘延柱 戈新生 潘振宽) (Z-Library)_origin.pdf and /dev/null differ