Technical death metal: Technical death metal and 'progressive death metal' are related terms that refer to bands distinguished by the complexity of their music.

技术死亡金属：技术死亡金属和‘前卫死亡金属’是有关联的叫法，用于指明因乐曲复杂而成一派的乐队。

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Bands described as technical death metal or progressive death metal usually fuse common death metal aesthetics with elements of progressive rock, jazz or classical music.

被描述为技术死亡金属或前卫死亡金属的乐队通常混合了普通的死亡金属美学和前卫摇滚、爵士乐或古典乐的元素。

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The most severe complication of measles - occurring in only one in 100, 000 cases - is a slowly-progressive brain disorder which does not normally show until some time after the original infection, causing seizures and even death.

BBC: Q&A: Measles and MMR