书籍 Summit 1B - 第 6 单元 - 第 3 课

the hard or pointed part of a bird's mouth

a hard, pointed, often curved structure found on the head of some animals, such as cows, goats, and sheep, made of keratin or bone, used for defense, display, or digging

a group of people, often with shared characteristics, who regularly interact with each other

(of a thing or type of behavior) appropriate for or intended to defend one against damage or harm

related to the body rather than the mind

an important or distinctive aspect of something

a group of birds of the same type, flying and feeding together

a group of animals, such as cows, sheep, etc. that are from the same species, which move and feed together

a large number of fish or sea mammals that swim together

a group of animals of the same type hunting or living together, particularly wolves

a sharp and curved nail on the toe of an animal or a bird

the horny and hard part at the end of a limb of a mammal, such as a horse