23世纪,人口爆炸、环境污染、臭氧层破裂、能源危机等一系列问题,像一把把枷锁,锁住了人类的咽喉。我们再也见不着那些可爱的小动物和绿色植物了。只有一个差不多被人遗忘的地方还在散发着氧气,支撑着整个脆弱的星球。——题记 In the 23rd century, a series of problems such as population explosion, environmental pollution, ozone layer rupture, and energy crisis were like a chain lock that locked the human throat. We can no longer see those lovely animals and green plants. Only an almost forgotten place is still emitting oxygen, supporting the entire fragile planet. --Inscription