You can see on the left that a central vascular channel (Haversian canal) is surrounded by concentric lamellae (layers) of bone.是什么意思_You can see on the left that a central vascular channel (Haversian canal) is surrounded by concentric lamellae (layers) of bone.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句