Create an interactive HTML presentation explaining the concept of 'Network Effects' where connections grow exponentially as user count increases (e.g., 5x users = 27x connections). The interface should include a slider allowing the viewer to manually adjust the number of users and see the resulting change in connection density in real-time. Use only HTML and JavaScript without external image assets. Include voice narration synchronized with the visual changes.
中文译文
创建一份交互式 HTML 演示，解释“Network Effects”这一概念：随着用户数量增加，连接数呈指数增长（例如 5 倍用户 = 27 倍连接）。界面应包含一个滑块，让观看者可以手动调整用户数量，并实时看到连接密度随之发生的变化。只使用 HTML 和 JavaScript，不使用外部图片素材。包含与视觉变化同步的语音旁白。
