Most birds flap their wings up and down, but hummingbirds move their wings in a figure-eight pattern.
大多数的鸟是上下拍打翅膀飞行,但蜂鸟不一样,它是以八字形移动翅膀。
2
When I pulled into the property, I could see two functioning test models of Skyride weaving in and out of the trees and cornfields; one a figure-eight track, the other an eighth of a mile around.
Analemmas may also appear for observers on the surfaces of other planets, based on orbital calculations, but for some worlds the shape of the sun's path wouldn't trace a figureeight.