这种类型的血块是已知的作为慢性硬膜下出血，并能保持未被发现了一段时间。

This type of clot is known as a chronic subdural haemorrhage, and can remain undetected for some time.

youdao

这种类型的血块是已知的作为慢性硬膜下出血，并能保持未被发现了一段时间。

This type of clot is known as a chronic subdural haemorrhage, and can remain undetected for some time.

youdao