Definition
When a group of organisms, whether plants, animals, or humans, progressively perish over time.
逐渐死去；全部消亡
Many species are dying off due to changes in the environment.
许多物种因环境变化而逐渐消亡。
This rare plant has been dying off in the area over the years.
这种稀有植物多年来在该地区逐渐消失。
As living conditions deteriorate, the population is decreasing, and many people are dying off.
随着生活条件恶化，人口正在减少，许多人逐渐死去。