" Featherless bipeds" was his official designation.

他认为人类是“有羽两足动物”。

Some baby birds hatch blind and featherless, and need to be fed and kept warm by their parents.

一些破壳后是看不见，它们需要被父母喂养，保持体温。

But this particular bird belongs to an invasive species, so rather than letting it go, she decided to keep the flightless, featherless chick as a pet.

然而，这只特别属于入侵物，因此，她有选择将其放生，而是决定收养这只无法飞行、羽未丰作为宠物。

They had pointed snouts, big eyes, and sometimes beaks instead of teeth, making them look less like lizards and more like … featherless birds.

它们有着尖尖吻部， 大大眼睛， 有时还长着喙而不是牙齿，这让它们看起来不像是蜥蜴， 反而更像是… … 有羽。

For example, the denotation of human is any person such as John and Mary, and its connotation is " biped." " featherless, " " rational, " etc.

例如，人外延是任何人，如约翰和玛丽；内涵是 “两足动物”“无羽”“有理性” 等。

His haunches were bony, like featherless wings, and his eyes were sunk into his head.

他腰部瘦骨嶙峋，就像有羽翅膀，他眼睛深陷在脑袋里。