求翻译：水是人类及其他生物繁殖的基本条件，是人类生活不可替代的重要资源。有这么一则公益广告：“人类最后一滴水，就是自己的眼泪！”此时，我仿佛看见一滴硕大的眼珠滚落而下，坠地有声。泪珠的后面到处是裂开的土地，枯死的庄稼，我隐隐听见大自然因干渴垂危而发出的痛苦呻吟。是什么意思？

Water is a basic condition of humans and other biological reproduction, human life is irreplaceable resources. So a public service ad: "last drop of mankind, is their tears! "At this point, I could see a drop of huge eyes rolled down, fell to sound. Behind the tear is split around the land, withered crops, I faint to hear natural thirst for danger the issue of a painful groan.