Tracking the movement of the tagged dolphins 追踪受标记河豚的动向
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
on how the dolphins are moving through the dams and canals. 河豚如何跨越水坝和运河的关键数据
Following the dolphins in the murky water is extremely challenging. 在浑浊的水中跟随印度河豚十分困难
Nearly 30 dolphins had to be rescued in one month alone. 仅一个月便有近30只印度河豚陷入危险 不得不依靠救援
Here, 1,000 miles from the sea, are dolphins. 距离海洋一千六百公里的这个地方 有江豚
and the dolphins block the baitball's retreat. 海豚们锁定了从海面撤退的鱼群
The dolphins leave as soon as they've had their fill 海豚吃饱后迅速离开了