This situation existed from the beginning of the last century up to date.
这一状况自从上世纪初延续至今。
But the nature of physiological concept has not been changed from beginning up to now.
然无论内涵与外延之变迁如何，其为生理概念之属性，始终未曾变化。
But the nature of physiological concept has not been changed from beginning up to now.
然无论内涵与外延之变迁如何，其为生理概念之属性，始终未曾变化。
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