They've crossed the river and then they've crossed back, 它们来来回回过河
Have they got the dolphin? Yeah, I think so. They've got it. 他们救起河豚了吗 -是的 救起来了
and over that time they've been monitoring 那段时间里 他们一直在监测
And they've now developed a taste for pigeon. 现在它们将猎食对象转向了鸽子
This is what they've been heading for... 这里就是它们的目的地
The dolphins leave as soon as they've had their fill 海豚吃饱后迅速离开了