A group of ethmoidal cellules were formed among the lacrimal bone, frontal bone and nasal bone.

泪骨，额骨和鼻骨之间围成一个狭长的筛鼻甲窦（部）。

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A group of ethmoidal cellules were formed among the lacrimal bone, frontal bone and nasal bone.

泪骨，额骨和鼻骨之间围成一个狭长的筛鼻甲窦（部）。

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