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Chasing 100M Daily Users, Duolingo Reconsiders Ads, Paying Influencers, and Its Most Expensive Plan

AI got cheap enough that Duolingo’s most expensive plan may not survive it. I read the earnings call transcript and opened the app to see what is actually changing for learners.

Dhawal Shah Sep 03, 2026

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人工智能与计算科学


人工智能与计算机科学是人工智能时代学习各种领域工科知识的基础，了解人工智能的基本概念和原理，才能应用AI的知识、工具和方法辅助复杂工程问题的解决。
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传热学


系统讲解导热、对流、辐射及换热器热计算，帮助学习者掌握传热量计算与强化或削弱传热的方法。
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旅游学英语-中国篇


以中国七大区域的景观、历史与民俗为素材，学习用英语介绍中国旅游文化并提升口语表达能力。
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无机化学


系统讲授无机化学的热力学、反应平衡、原子与分子结构及配位化学基础。
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大学化学


化学是一门创造新物质的科学，也是一门与我们的生活、环境、材料、医药、国防、航空航天等具有紧密联系的自然科学。坚实的化学基础将帮助我们完善知识结构，提高分析问题和解决实际问题的能力。
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数值分析


系统学习线性方程组、非线性方程、插值拟合、数值积分及微分方程的数值方法与误差分析。
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分析化学


结合滴定、光谱和色谱等化学与仪器方法，学习物质组成、含量及结构的分析测定。
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物理化学（上）

系统学习物理化学中的热力学、多组分系统、化学平衡与相平衡，掌握分析和处理相关问题的方法。
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系统学习电化学、化学动力学、界面与胶体化学及统计热力学，掌握分析和处理物理化学问题的方法。
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政治学


以国家、权力、政党、民主与正义等核心概念为线索，理解中国国家治理与政治发展的逻辑。
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采矿学


采矿学是采矿工程专业核心专业课程的重要组成部分，讲授露天开采的基本概念、工艺过程、露天矿设计与生产计划等。
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本课程的学习可以使学生掌握最新实用的材料研究方法，拓展其在材料研究领域的视野，为以后在材料领域开展研究工作打下坚实的理论基础。
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传热学


系统讲解导热、对流、辐射、相变换热及换热器热计算，培养工程传热问题的分析与计算能力。
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资源经济学


《资源经济学》为采矿工程专业本科生学位必修课。课程全面系统地学习矿产资源的相关知识，了解世界矿产资源概况、我国矿产资源的基本特点、我国矿产资源开发利用存在的主要问题等。
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从风险识别与管理出发，系统讲解保险原理、合同、财产与人身保险及保险理财配置。
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