每当提起这种巨大的水栖哺乳动物，未知的总是比已知的多。

There is more unknown than known when it comes to this giant aquatic mammal.

youdao

每当提起这种巨大的水栖哺乳动物，未知的总是比已知的多。

There is more unknown than known when it comes to this giant aquatic mammal.

youdao