But the bottleneck dolphins, which live in deep offshore waters, had empty stomachs, meaning that they could have been disoriented and were swimming for some time to reorient themselves.

• 科学家经检查后发现，这些生活在深海地区的海豚，胃里面都是空的。这说明它们可能丧失了辨别方向的能力，并且已经游了一段时间，以便让自己再次确定方位。