In 1890 he proposed that evolution was irreversible: that 'an organism is unable to return, even partially, to a previous stage already realised in the ranks of its ancestors'.

1890年，他提出进化是不可逆转的：“一个有机体无法回到其祖先先前到达的阶段，即使是部分逆转，也不可能。”

youdao

It is possible to determine the information from the previous stage of the maturity model.

由成熟度模型的前一个阶段确定信息是可能的。

youdao

From the previous stage, you now have some fully matured and consumable services (Figure 13).

通过之前的阶段，您现在已经获得了一些完全成熟和可消费的服务(图13)。

youdao

Mayo's victory ended a two-year drought and the Spaniard said afterwards that he had believed a return to winning ways was imminent on the previous stage.

BBC: SPORT | Other Sport... | Cycling | Mayo masters Alps to claim stage

Previous Second Stage artist.

NPR: White Light Riot: 'Charlatan'

This is Morocco's fourth attempt to host the World Cup after failing in previous bids to stage the 1994, 1998 and 2006 finals.

BBC: SPORT | Football | African | Morocco to host Blatter