translation.en: But it turns out that when just a single boat is approaching a group of dolphins the dolphins will start whistling, they'll change what they're doing, they'll have a more cohesive group, wait for the boat to go by, and then they'll get back to normal business.
translation.zh: 但事实表明， 当今仅有一艘船在数百米开外 靠近一群海豚时， 这些海豚会开始发出哨声， 它们会放弃正在做的事，聚集成更大的群体， 等待这艘船驶过， 然后它们会回复正常。