These old bones are worn 这些老骨头也心魄
In the birds, however, these bones are reinforced more massively by internal struts.
但是,在鸟类中,这些骨骼通过内部的支柱得到了更大的加固。
这些是胎儿的耳骨。
These vibrations are then transferred along the tiny bones of the middle ear and converted into nerve signals. The cortex then processes these signals, telling us what we are hearing.
这种震动沿着中耳的小骨迁移并被转换为神经信号,大脑皮质处理这些信号,让我们得知我们听到了什么。
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