CET-MASTER. CET MASTER是一款专为大学CET-4 和 CET-6设计的极简背单词 Web 工具，专注记忆本身，无干扰、无追踪、可全本地运行。A minimalist, privacy-first vocabulary memorization tool for CET-4 & CET-6, built for pure focus and efficient word mastery.