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

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。

youdao

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

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。

youdao