除了隔音设置，低音垫，橡胶的感觉，你必须选择你的耳朵大小合适的，那么你就可以得到最好的音质。
Besides the sound insulation set, the bass of the cushion, the feeling of the rubber, you must choose the right size for your ear then you can get the best sound quality.
3D 打印机已经被用来制作实物大小的汽车零件模型和人造身体部位，例如耳朵。
3D printers are already used to make life-size models of car parts, and man-made body parts, such as ears.
我们的眼睛的大小从我们出生开始就定下来了。但是我们的鼻子和耳朵却在不断变大。
Our eyes are always about the same size from birth, but our nose and ears never stop growing.
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