" Featherless bipeds" was his official designation.

他认为人类是“有羽毛的两足动物”。

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

一些小破壳后是看不见的且毛的，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，这只特别的入侵物，因此，她有择将其放生，而是决定收养这只无法飞行、羽毛未丰的小作为宠物。

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

它们有着尖尖的吻部， 大大的眼睛， 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… … 有羽毛的。

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

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

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

他的腰部瘦骨嶙峋，就像有羽毛的翅膀，他的眼睛深陷在脑袋里。