Think of someone going under — under the water, or under an illness — and something or someone reaching in and pulling them back before it is too late. Both meanings hold that one picture. The adjective names the thing that does the pulling back: the operation, the drug, the machine. The noun names the skill of doing it in water, learned on purpose and until it works.
可以想成一個人正在往下沉：沉進水裡，或沉進一場重病。然後有另一個人、或一台機器，在來不及之前把他拉回來。life-saving 的兩個意思都停在這個畫面上。形容詞指的是「把人拉回來的那個東西」——手術、藥、設備。名詞指的是「在水裡把人拉回來的那套本事」，是特地學來、練到用得出來的。
登入就可以看每一支怎麼連回核心畫面。