Unverified50% confidenceFactExact time

NextLesson宣称完全免费，并支持多种输入格式（视频、PDF、笔记）

1

Sources

50%

Confidence

Medium-term (~90 days)

Relevance

9/23/2026

First Seen

Valid until: 12/22/2026

Sources

NextLesson：把YouTube与PDF变成免费学习卡片的新工具

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