2019-2020学年度人教版选修六Unit4Global WarmingPeriod2Language points课件(44张)
2019-2020学年度人教版选修六Unit4Global WarmingPeriod2Language points课件(44张)第2页

1. An energy source is “renewable” when supplies of it never run out and “non-renewable” when one day they will run out.

我们称用之不竭的资源为“可更新资源”。称最终会枯竭的资源为“不可更新资源”。