any of numerous minute wingless primitive insects possessing a special abdominal appendage that allows the characteristic nearly perpetual springing pattern; found in soil rich in organic debris or on the surface of snow or water

• 许多微小无翅膀的原始昆虫，有特殊的腹部附肢可以几乎一直保持弹跳的姿势；常见于富含残骸组织的土壤或雪、水的表面