3 sentences

1. 它们比美国海狸小，没有尾巴。

   tā​men bǐ měi​guó hǎi​lí xiǎo, méi​yǒu wěi​ba.

   They are smaller than American beavers and don't have tails.

   Source: CCMatrix

2. 没有了海狸，生态系统迅速恶化。

   méi​yǒu le hǎi​lí, shēng​tài​xì​tǒng xùn​sù è​huà.

   Without the beavers, the ecosystem deteriorated rapidly.

   Source: CCMatrix

3. 只有两个品种的海狸，生活在欧洲和北美。

   zhǐ​yǒu liǎng ge pǐn​zhǒng de hǎi​lí, shēng​huó zài ōu​zhōu hé běi​měi.

   There are only two species of beavers, living in Europe and North America.

   Source: CCMatrix