白板马克笔讲解动画 · 4 秒快测Whiteboard marker explainer · 4s quick test

彩色马克笔在白板上画出图示与箭头，一只手持续入镜。适合流程讲解、产品对比、营销短片。【4 秒快测版】内容与原版一致，压到 4 秒用于试参数、试素材、试机器，不用于出成片。

Colored markers sketch diagrams and arrows on a whiteboard, a hand staying in frame throughout. Built for process explainers and marketing walk-throughs. [4s quick test] Same content as the full-length version, cut to 4 seconds for checking parameters, assets and hardware — not for final delivery.