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。

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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.

进入试验场，我看见两套正运转的空中脚踏车模拟装置。 轨道在树和玉米地间穿进穿出，一个是8字形悬轨，另一个的8字有大概一英里长。

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Lysacek became the first American man to win gold in figure skating since nineteen eighty-eight.

VOA: special.2010.02.26

The two placed a pair of gloves down on center ice, and Mr. Martin executed tight, figure-eight turns while shifting weight between inside and outer skates.

WSJ: What's Your Workout? A Skater's Edge

He set up a number of challenges (three of which have since been claimed) each with a financial reward reflecting their difficulty: The first to fly a figure-eight course around two markers half a mile apart, the first to fly from England to France and a world speed challenge.

ENGADGET: The Highs and Lows of Human-Powered Flight Alt

MacCready took on the first Kremer prize -- for flying a figure eight -- in 1977 with his Gossamer Condor craft.

ENGADGET: The Highs and Lows of Human-Powered Flight Alt