对岩石薄片的 X 射线检查有时会发现可怕的触角轮廓、消化道和很多种海洋生物的视觉器官。
X-ray examination of thin slabs of rock sometimes reveals the ghostly outlines of tentacles, digestive tracts, and visual organs of a variety of marine creatures.
然而,他们虽然仍呼吸着空气,却从未进化出类似于腮这种早期海洋生物的器官。
They do, however, still breathe air, having never developed anything equivalent to the gills of their earlier marine incarnation.
他们对生物器官与组织细微结构进行研究。
They study these microscopic structures of tissues and organs.
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