顶层媒体夹Master Bin

Master Bin（顶层媒体夹）是每个项目自带的根媒体夹，列在媒体夹列表顶部，所有存放素材的媒体夹都包含在它里面。

• 可以把它理解为项目的顶层目录。
• 新建媒体夹时，新媒体夹会自动建立在当前选中的媒体夹内部；选中 Master bin 再新建，就建在顶层。
• 整理素材时，通常先建几个分类媒体夹（如 TIMELINES、VIDEO、AUDIO），再各自往里归置素材。

The Master Bin is the root bin that comes with every project, listed at the top of the bin list, with every other bin contained inside it.

• Think of it as the top-level folder of your project.
• New bins are created inside the currently selected bin; select the Master bin to create one at the top level.
• For tidiness, create category bins such as TIMELINES, VIDEO, and AUDIO, then file your media into them.