寿命: lifespan

日本人にほんじんの平均へいきん寿命じゅみょうは世界せかいでも高たかい。

The average lifespan of Japanese people is high even by world standards.

そのため、今いまの人ひとより、寿命じゅみょうはずっと短みじかかったと考かんがえられています。

For that reason, it is thought that their life expectancy was much shorter than that of people today.