核心畫面
Picture a pace you could hold all day without collapsing — nothing is being burned through faster than it can be replaced. That is the test the word applies: can this keep going at this level, or does it run itself out?
可以想成：一種你可以維持一整天而不會累垮的速度——消耗的東西沒有超過補得回來的量。這個字問的一直是同一個問題：照這樣…更多收起
可以想成：一種你可以維持一整天而不會累垮的速度——消耗的東西沒有超過補得回來的量。這個字問的一直是同一個問題：照這樣下去撐得住嗎，還是會把自己耗光？環保上的「永續」只是把這個問題拿去問整個地球。原始詞典資料3 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
sustainableadj/səˈsteɪnəbəl/
- 1
Able to be sustained.
- 2
Able to be produced or sustained for an indefinite period without damaging the environment, or without depleting a resource; renewable.
- sustainable economy
- In addition to the resources listed in the organic and local food sections earlier, a good source of sustainable meat is Heritage Foods USA (heritagefoodsusa.com).
sustainablenoun/səˈsteɪnəbəl/
- 1
A renewable energy source.
- It has only been in the last 20 years that the long-term trend away from fossil fuels and toward nuclear energy and sustainables has intensified.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。