心包由两个不同的亚层组成：坚固的外纤维心包和内浆液心包。
The pericardium consists of two distinct sublayers: the sturdy outer fibrous pericardium and the inner serous pericardium.
如果我们在糖纤维外裹上水不溶性聚合物，当糖溶化时，就能得到这样的细管。
He noted that if we could coat the fibres with a water insoluble polymer, we could obtain tubes once the sugar dissolved.
对于肝纤维化，目前除了肝脏移植外，没有其它有效的治疗方法。
There are really no effective therapies for liver fibrosis-there is only transplantation.
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