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English Summary: Changyan Mandarin APP is a comprehensive mobile application designed for Mandarin proficiency test preparation and learning. It offers features like test registration, simulated exams, pronunciation correction, and live courses, targeting professionals such as teachers, broadcasters, and public service workers. (中文摘要翻译: 畅言普通话APP是一款专为普通话水平测试备考和学习设计的综合性移动应用，提供考试报名、模拟测试、发音纠正和在线直播课程等功能，主要面向教师、播音员和公共服务行业人员等专业人士。)

DeepSeek is reportedly developing a new flagship AI model, DeepSeek V4, with enhanced coding capabilities, set to launch around Chinese New Year in mid-February. Recent GitHub code updates reveal a new model identifier "MODEL1" with distinct technical features including KV cache layout, sparsity handling, and FP8 decoding support, suggesting optimized memory and computational efficiency. The model may also incorporate recent research on optimized residual connections and biologically-inspired AI memory modules. (DeepSeek据称正在开发新一代旗舰AI模型DeepSeek V4，具备更强的编程能力，计划于2月中旬农历新年期间发布。近期GitHub代码更新显示新的模型标识符“MODEL1”具有独特技术特征，包括键值缓存布局、稀疏性处理和FP8解码支持，表明在内存优化和计算效率方面进行了针对性设计。该模型可能整合优化残差连接和受生物学启发的AI记忆模块等最新研究成果。)

This article provides a comprehensive learning path and curated resources for beginners in data science, covering essential skills, tools, and practical steps to start a career in this field. (本文为数据科学初学者提供了全面的学习路径和精选资源，涵盖核心技能、工具和开启职业生涯的实用步骤。)

This article provides a structured learning path and essential resources for beginners in data science, covering foundational concepts, practical tools, and career development strategies. (本文为数据科学初学者提供系统学习路径和核心资源，涵盖基础概念、实用工具和职业发展策略。)

This content discusses the collaboration dynamics among Chinese voice acting studios in radio drama production, highlighting key studios like 光合积木, 729声工厂, and 边江工作室, and explores regional distinctions and industry trends. (本文探讨了中国广播剧配音工作室之间的合作模式，重点介绍了光合积木、729声工厂和边江工作室等主要工作室，并分析了地域差异和行业趋势。)

English Summary: xAI's Grok-4 model, launched in July 2025, claims to be the world's strongest AI with superior logical reasoning and language understanding, achieving doctoral-level academic performance. The Grok-4 Heavy version scored 44.4% on the Humanity's Last Exam benchmark. While official access requires paid subscriptions, the DeepSider browser extension offers free access to Grok-4 and other top models like GPT-4o and Claude 4 Sonnet for Chinese users without VPN or foreign email requirements. 中文摘要翻译：2025年7月，马斯克旗下xAI公司发布Grok-4模型，号称“世界最强AI”，具备更强的逻辑推理和语言理解能力，学术表现达博士水平。Grok-4 Heavy在Humanity's Last Exam基准测试中获44.4%高分。官方需付费订阅，但DeepSider浏览器插件为国内用户提供免费体验Grok-4、GPT-4o等顶级模型的便捷途径，无需翻墙或海外邮箱。

Grok-4, xAI's latest LLM launched in July 2025, excels in reasoning, coding, and multimodal tasks, competing directly with GPT-4o and Claude 4. It features real-time data access via X platform and strong benchmark performance in math/science domains. (Grok-4是xAI于2025年7月发布的最新大语言模型，在推理、编码和多模态任务中表现卓越，直接对标GPT-4o和Claude 4。其通过X平台实现实时数据访问，在数学/科学基准测试中表现突出。)

English Summary: This guide introduces Grok-4.1 Chinese version, which achieves a leading 1483 Elo score on LMArena, surpassing GPT-5 by 31 points. It highlights key advantages for Chinese users: no VPN required, optimized Chinese dialogue, and access through domestic mirror sites. The article also covers performance metrics like 65% reduced hallucination rate and high EQ-Bench scores, along with practical usage tips and safety assurances. 中文摘要翻译：本指南介绍Grok-4.1中文版，该模型在LMArena上以1483分领先，超越GPT-5达31分。重点突出对中国用户的优势：无需翻墙、中文对话优化、通过国内镜像站访问。文章还涵盖性能指标，如幻觉率降低65%、高情商得分，以及实用使用技巧和安全保障。

Grok-4 is xAI's next-generation multimodal AI model featuring 130K token context, first-principles reasoning, real-time DeepSearch, and specialized Grok4 Code for programming. It offers free limited access, competes with leading AI systems, and provides enterprise-grade APIs with advanced security. (Grok-4是xAI开发的下一代多模态AI模型，具备13万词元上下文窗口、第一性原理推理、实时DeepSearch搜索和专用编程模型Grok4 Code。提供限时免费访问，与主流AI系统竞争，并配备企业级API和高级安全功能。)