| 单词 | airfoils |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔rotorcraft〕An aircraft, especially a helicopter, that is kept partially or completely airborne by airfoils rotating around a vertical axis.旋翼机，旋翼飞行器：尤指直升机等飞机通过旋翼绕一垂直的轴旋转以使其可以部分或完全停留在空中美国传统〔rotor〕An assembly of rotating horizontal airfoils, as that of a helicopter.旋翼：如直升飞机的旋翼等旋转的水平机翼的组合体美国传统 |
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