They have a wing span of around 2.75 meters (9 feet).
它们翅翼展开可达二点七五米(9英尺)。
Some eagles have a wing span of one and a half meters.
有些鹰的翅膀展开长达一米半。
Built from carbon fibres and balsa wood, Snowbird has a wing span of 32m (105 feet) - comparable to a Boeing 737.
雪鸟是由碳纤维和轻质木制成的，机翼长总32米(105英尺)，堪比波音737。
Tip vortex goes downstream outward along the span direction, and the induced drag of the wing decreases.
翼尖涡沿着展向方向向外移动，机翼诱导阻力减小。
Tip vortex goes downstream outward along the span direction, and the induced drag of the wing decreases.
翼尖涡沿着展向方向向外移动，机翼诱导阻力减小。
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