Now they were peeking inside his brain to see if a mysterious shadow on a previous CT image might be an internal clot, or hematoma, at the rear of the skull, indicating a blow to the head.

现在他们向冰人的脑部里面进行窥视，看之前的CT影像中的神秘的阴影是否是一块位于后脑壳内部的结块，或血肿，如此便可表明脑部受到一击。

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Real blood vessels have an internal coating of cells that ensure that the blood does not clot.

真血管内部有一层细胞包被，可以确保血液不会凝结。

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