flower

Flowers, birds, fish and insects, played as four elegant, are people's leisure pets. Flowers refer to flowers and plants, and birds refer to birds; Fish refers to goldfish; Insects used to mainly refer to singing insects such as slugs and crickets, and now they also include beetles.

1. flower: it is the sexual reproductive organ of seed plants and an abnormal short branch with reproductive function. Typical flowers have limited growth on the short axis and have calyx, petals, stamens and pistils that produce germ cells. Flowers consist of corolla, calyx, receptacle and stamens. This place refers to flowers.

2. Bird: A vertebrate evolved from a reptile, which is characterized by being covered with feathers, constant body temperature and oviparous reproduction. The birds here are raised birds and used for entertainment in their spare time.

3. Fish: It is a vertebrate, and its body consists of three parts: head, trunk and tail. From the front end of the fish to the rear edge of the operculum, the head has external organs such as snout, mouth, eyes, nostrils and gill holes. Some fish also have tentacles before kissing. The trunk is directly behind the head and goes straight to the anus. From anus to the base of caudal fin is tail. The trunk and tail have external organs such as pectoral fin, dorsal fin, ventral fin, anal fin, caudal fin and lateral line. They usually live in water all the year round, breathing with their gills and swimming with their fins. The fish here mainly refers to the fed fish.

4. Insects: mainly insects, belonging to Insecta. The body is divided into three parts: head, chest and abdomen, and usually has two pairs of wings and three pairs of feet. Wings and feet are in the chest, and the body consists of a series of body segments, which are further assembled into three body segments (head, chest and abdomen), usually with two pairs of wings. 1 The pair of antennae are born in the head and the bones are wrapped in the body; Life forms have changed a lot, all over the world. It is one of the most diverse arthropods. For entertainment and leisure, there are usually crickets or crickets, which are played by people other than children to show childlike innocence.

These "four things" have always been things that aristocratic gentlemen spend time and talk to themselves. It is also the theme of ancient literati's lamentation, in order to get leisure and fun.