A tiny feathered "thumb," the alula, improves flight control. The protruding shaft on the first wing feather makes a loud, rustling sound—adding acoustics to the visual display.
微小的拇翼改善了对飞行的控制能力，第一翼羽上的凸出轴结构会发出沙沙的响声——在保持视觉效果的同时还增添了声学效果。
ARCHITECTS aiming to create rooms with crowd-pleasing acoustics could soon rely on a pair of virtual ears to sound out their designs.
建筑学家总是想设计出群众满意的声学环境房屋，但设计是否理想，不久就可借助虚拟耳朵来进行验证了。
The protruding shaft on the first wing feather makes a loud, rustling sound—adding acoustics to the visual display. At Peabody Museum of Natural History, Yale University
微小的拇翼改善了对飞行的控制能力，第一翼羽上的凸出轴结构会发出沙沙的响声——在保持视觉效果的同时还增添了声学效果。
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