keynote
/ˈkiːnəʊt/noun
1
- a prevailing tone or central theme, typically one set or introduced at the start of a conference基调; 要旨：
individuality is the keynote of the Nineties
个性化是90年代的基调
as modifier he delivered the keynote address at the launch.他在发布会上发表了主旨演说。
2
- Music the note on which a key is based【乐】主音。