One definition of biodiversity is the differences of life at all levels of biological organization.

VOA: special.2010.05.25

Well a natural definition of death might be something like the end of life.

正常的理解是死亡是,生命的终结

耶鲁公开课 - 死亡课程节选

Well a natural definition of death might be something like the end of life.

正常的理解是死亡是,生命的终结

耶鲁公开课 - 死亡课程节选