還能活多久
這一組把那條線畫在活的東西上。
noun · B2
The number of years a person or an animal is expected to live. It is usually an average worked out for a whole group, not a statement about one particular life.
平均壽命
核心畫面
You can picture a line drawn forward from today: this is how far we expect it to run. The line is drawn from records of how far the same kind of thing has run before, so it is an estimate about a group, never a promise about one case. Whether the line belongs to a person or to a boiler changes nothing about how it is drawn.
可以想成從今天往前畫出去的一條線：我們預期它能走到這裡。這條線是根據同一類的東西以前走多遠畫出來的，所以它是對一群對…更多收起
可以想成從今天往前畫出去的一條線：我們預期它能走到這裡。這條線是根據同一類的東西以前走多遠畫出來的，所以它是對一群對象的估計，不是對單一個案的保證。這條線是屬於一個人，還是屬於一台熱水器，畫法完全一樣。Two branches
還能用多久
同一條線畫在沒有生命的東西上。東西不會「活著」，但一樣會走到撐不住的那一點，所以英文借用了同一個詞。
noun · B2
How long a thing is expected to keep working or stay useful — a machine, a battery, a building, a product, even an idea or a plan.
使用壽命