从一开始英语（from）

from day one从一开始

(from day one不要翻译为来自一天这是一个固定习语）

举个例子：

The researchers have also posed the idea that nutrition, injury or infection in early life can have an impact on brain reserve, suggesting that we should look after our brain from day one.

研究人员也提出了这样一个想法，即早期营养，伤害或感染都会对大脑容量产生影响，这表明我们应该从一开始就好好照顾大脑。