sirenians

与sirenians相关的网络例句 [注：此内容来源于网络，仅供参考]

Perrin W F and Myrick A C. Growth of odontocetes and sirenians: International Conference on Determining Age of Odontocete Cetaceans and Sirenians.

假设按照一个生长层组代表半年来计算，我馆饲养的此白鲸的年龄则在17岁左右，这与该白鲸的身体特征明显不符。

There are only five living species of sirenians, known collectively as "sea-cows," including the dugong and the manatees.

只有5种海牛生活，统称为"海牛"，包括dugong和海牛。

The first Sirenians appeared in the early Eocene in Europe, but by the close of this epoch, they had spread to tropical Asia and North America.

早在第一次出现海牛 Eocene 在欧洲，但这个时代的结束，他们分布在热带亚洲和北美洲。