巨型乌贼很难被声纳发现因为它们有柔软的身体而且没有骨骼。

They are difficult to detect by sonar because they have soft bodies with no skeleton.

youdao

巨型乌贼很难被声纳发现因为它们有柔软的身体而且没有骨骼。

They are difficult to detect by sonar because they have soft bodies with no skeleton.

youdao