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<!DOCTYPE html> <html> <body> <h2>使用“严格模式”：</h2> <h3>不允许重复参数名称。</h3> <p>在浏览器中激活调试 (F12) 以查看错误报告。</p> <script> "use strict"; function x(p1, p1) {}; // 这会导致错误 </script> </body> </html>