And yet despite this grim forecast, 虽然前景黯淡

317. In the last 50 years alone,
     光是在过去的50年中
318. wildlife populations have fallen by an average of almost 70%,
     野生动物种群就已平均下降将近70%
319. and this time, we are the ones responsible.
     这一次 我们是罪魁祸首
320. And yet despite this grim forecast,
     虽然前景黯淡
321. there remains a glimmer of hope.
     但仍有一线希望
322. We are the first species in the four-billion-year story of life
     40亿年的生命故事中
323. to understand what is happening to our world.
     我们是第一个理解世界发展的物种

来自《我们星球上的生命 第一季 第八集 Life on Our Planet S01E08 冰与火的世纪》第 320 行