So one of the dolphins actually went about 46km upstream 一只河豚从放生处逆流而上46公里之远

298. It's the happiest moment of my life.
     这是我人生中最高兴的一刻
299. Within a few weeks, the tags begin to reveal some new insights.
     几周中 标记开始帮助我们能更多的了解印度河豚
300. They are moving quite a lot, which we never expected.
     它们移♥动♥的很频繁 这是我们从未预料到的
301. So one of the dolphins actually went about 46km upstream
     一只河豚从放生处逆流而上46公里之远
302. from the release site, and the other thing is that we thought
     还有一个新发现就是
303. that they will stay in the main river stream,
     我们本以为河豚会留在河流干流
304. but they are using side channels. It is extremely interesting.
     但实际上它们经常会游进支流中 特别有意思

来自《行星地球 第三季 第四集 Planet Earth S03E04 淡水》第 301 行