People often assume that Chopin was French - he spent half his life in France and is buried there in the famous Pere Lachaise cemetery in Paris.

VOA: standard.2010.03.04

It has a half-life of approximately three years at which time it stops decaying.

它生命的一半是三年,在三年的时候，它就停止衰亡。

麻省理工公开课 - 固态化学导论课程节选