美国有线新闻 CNN 用无人机保护濒临灭绝的毛伊海豚（在线收听）

What species of dolphin is the smallest? Hector's dolphin, Risso's dolphin, Spinner dolphin or Dusky dolphin. The smallest dolphins are Hector's dolphins. They're usually around four to five feet long and 100 pounds.

以下哪种海豚最小？赫氏矮海豚、灰海豚、飞旋海豚还是暗斑海豚？最小的海豚是赫氏矮海豚。它们通常长4到5英尺，重100磅。

And they are rare. You will only find Hector's dolphins off the coast of New Zealand. And there's a subspecies of them called Maui dolphins whose population has dwindled to just a few dozen left in the wild. The biggest threat to Maui dolphins is when they're caught by accident in the fishing industry. Disease, danger to their habitat and tourism are also suspected in reducing their numbers.

赫氏矮海豚非常稀有。你只能在新西兰海岸附近找到赫氏矮海豚。它们的一个亚种叫毛伊海豚，该种群的野生数量已经减少到只剩下几十只了。毛伊海豚面临的最大威胁是被捕鱼者意外捕获。疾病、对其栖息地的威胁以及旅游业的发展，都有可能导致它们的数量减少。

But there's a new eye in the sky and by that we mean a drone that aims to help Maui dolphins by locating, identifying and following them. The aircraft runs on electric and gas power. It's estimated to cost around $150,000 and it's aim is to use artificial intelligence technology to keep close tabs on the 63 adult Maui dolphins that are still alive.

但天空中出现了新眼睛，我们指的是一架旨在通过定位、识别和跟随毛伊海豚来帮助它们的无人机。这架无人架以电力和天然气提供动力。据估计，这个项目预计耗资15万美元，其目的是利用人工智能技术密切关注63只现存成年毛伊海豚。

On the opposite end of the dolphin spectrum in terms of numbers at least is the common dolphin. How common is it? Well exact numbers are hard to come by but these mammals are often found in pods by the thousand. They're common in all over the world. They're neither endangered nor threatened and when they stampede, so to speak, they're sight to see for sight seers.

毛伊海豚在海豚谱系中的对立面，至少就数量而言，普通海豚。有多普通？普通海豚的确切数量很难统计，但这些哺乳动物往往以千为单位被发现。它们在世界各地都很常见。它们既没有濒临灭绝，也没有受到威胁，可以说，对观光者来说，它们成群跳跃的画面是值得一看的风景。