原级：narration
1. \u0064\u0061\u006E\u0063\u0069\u002E\u0039\u0031\u0031\u0063\u0068\u0061\u002E\u0063\u006F\u006D
1. She explained blind people previously had to rely on volunteers'live narrations, which were often chaotic.
2. narrations
2. At the hot spots, the software will be stimulated to play audio narrations automatically.