The dugong's ancestors lived on land.

儒艮的祖先生活在陆地上。

And last year, a record number of dead dugongs were found in Thai waters.

去年，在泰国水域发现了大量儒艮死亡，死亡数量史无前例。

Human activity and water pollution have made dugong sightings in southern Thailand rare in recent years.

近年来，由于人类活动和水污染，儒艮出现在泰国南部的景象已经非常罕见。

I heard its teeth grind on sheet iron, and the dugong disappeared, taking our harpoon along with it.

我听到牙齿在小艇铁板上的喳喳声响，海马沉没不见了，把叉带走了。

For my part, I was simply distressed to see this dugong outwit our every scheme.

在我个人，我只是因为海马把我们所有的计谋部弄失败，心中有些不高兴罢了。

This dugong that Ned Land was preparing to attack was of colossal dimensions, easily exceeding seven meters in length.

尼德兰准备攻打的这条海马身躯巨大，身长至少超过七米。

Is the dugong dangerous to attack? I asked, despite the Canadian's shrug of the shoulders.

打这海马有危险吗。我问，我并不理会加拿大人做着耸肩的姿态。

An estimated 250 dugongs live in the waters off the Thai coast. They are a protected species under Thai law.

估计有250只儒艮生活在泰国海岸附近的水域。这种动物是受泰国法律保护的物种。

Dugongs are closely related to manatees, but they have another relative that may surprise you.

儒艮与海牛是近亲，但它们还有一个可能会让您大吃一惊的亲戚。

Otters and dugongs thrived in newly formed kelp forests, and baleen whales were at their most diverse.

水獭和儒艮在新形成的海带森林中繁衍生息，而须鲸的种类也最为丰富。