安全必须始终是我们每天每项操作的首要任务。
Safety must remain our top priority in every operation, every day.
Natural experiments can provide valuable insights into economic questions.
释义:即使家庭贫困,也要保留读书的希望;即使生活富裕,也不能忘记劳动的艰辛。
我唯一确定的是我一无所知。
没有什么比一项未完成的任务永远悬在那里更令人疲惫的了。
Wherever there is modularity there is the potential for misunderstanding: Hiding information implies a need to check communication.