1 actions that can save someone's life when they have fallen into water -- (對落水者的)救生術
a certificate in life-saving 救生證書
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
再长的路,一步步也能走完,再短的路,不迈开双脚也无法到达。