The standard criterion for the survival of a species is its success in competing with other species and adapting to slowly changing environments.

一个物种生存下来的标准是它能否成功地与其他物种竞争并适应缓慢变化的环境。

While Maple Hill's conversion program is unusually hands-on and comprehensive, it's just one of a growing number of businesses committed to slowly changing the way America farms.

虽然梅普尔希尔的改造项目非常实际和全面，但它只是日益增多的致力于缓慢改变美国种植模式的企业之一。

You were slowly changing to black and white.

你正慢慢变为黑色和白色。