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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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科学避孕与备孕


讲解短效药、避孕套和宫内节育器的原理，并结合年龄与身体状况指导科学选择避孕方式。
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人工智能产品创新认知


围绕人工智能硬件产品设计，学习从产品创意、设计思维到低保真原型与知识产权完成的创新流程。
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解码城市人工智能


以城市人工智能为核心，解读其面向城市场景的技术主题。
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软件工程造价师前置课程(25年11月)

以软件工程生命周期为主线，系统学习需求、设计、测试与维护，并通过小组开源项目实践完整开发流程。
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公司金融


从公司经理人和投资者双重视角，学习项目与公司价值评估、长期融资、资本结构及金融资产定价。
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清华长庚医院主任医师：儿童科学喂养与常见病防治全攻略


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职场人与学子的必备急救指南：清华长庚副主任医师揭秘“救命关键”

面向职场人与学子的公众急救指南，帮助学习者在关键时刻保护自己与他人的生命安全。
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秋冬鼻炎咽炎总发作？清华教授教你如何有效防治、顺畅呼吸

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大学生亲密关系教育公益讲座课程


解锁亲密关系密码，赋能青春成长，拥抱美好情感。
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学在清华·真人图书馆70期


以“真人图书馆”形式呈现“学在清华”系列第70期学习活动。
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生物制药技术


Explore biopharmaceutical technology covering gene engineering, animal cell pharma, antibody production, enzyme engineering, and fermentation across 8 comprehensive chapters.
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数学分析A

以实数完备性为底层框架，严密贯通一元函数极限、连续、微分与中值定理，训练抽象思维、逻辑推理和数学表达。
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生物化学


以结构与功能、物质与能量为主线，贯通生物大分子、代谢及遗传信息的生物化学体系。
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摄影基础


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土力学


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