And if the very few that survive pass onto their offspring whatever it was that helped them survive, then those offspring must be better adapted to the circumstances in which all this happened than their parents were.
もし　生き残った少数生物が 生存するのに 役立った要素を子孫に引き継げば その子孫は そのような状況に対して 彼らの両親よりも 適応性が 高いはずだ