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Against all the odds
尽管一路上困难重重
a few heroic individuals do make it to the top.
少数英勇的鱼儿果真登上巅峰
They find themselves in a near-perfect fish habitat...
找到几近完美的鱼类栖息地
..where the gobies can feed and grow and breed in peace.
虾虎鱼可以在这儿 安详地觅食，成长和繁殖
In time their own young will be swept downstream and out to sea
等时候到了，它们的幼鱼 会被冲到下游，流入大海
and the cycle will begin all over again.
整个循环重新开始
Fresh water presents particular challenges for fish.
淡水为鱼类带来特殊的挑战
Nutrients can be in very short supply in spring water,
泉水的养分可能严重短缺
so here fish must take every chance they can to find food.
这里的鱼儿 必须把握每个觅食的机会
The rain that falls on these Kenyan hills
在这一带的肯亚山丘
percolates through the rocks.
降下的雨水渗透岩石
Finally emerging as crystal clear pools.
终于形成晶莹剔透的水潭
Pools that are home to fish including barbel.
包括小鲤鱼在内的鱼类 栖息在水潭里
The fish share these waters with all sorts of creatures...
鱼类和其他各种生物 共享这片水域
