diff --git a/X. Appendices/D.2.1. Compatibility with the standard Java “JarFile”.md b/X. Appendices/D.2.1. Compatibility with the standard Java “JarFile”.md
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--- a/X. Appendices/D.2.1. Compatibility with the standard Java “JarFile”.md	
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+### 附录D.2.1 对标准Java "JarFile"的兼容性
+
+Spring Boot Loader努力保持对已有代码和库的兼容。`org.springframework.boot.loader.jar.JarFile`继承自`java.util.jar.JarFile`，可以作为降级替换。