这些肿瘤细胞产生了一整系列的蛋白酶，能降解包围它们的细胞外基质蛋白，这也是部分的基底膜。

The tumor cells produce a whole range of proteases that degrade the proteins of the extracellular matrix that hems them in, part of which is the basement membrane.

youdao

这些肿瘤细胞产生了一整系列的蛋白酶，能降解包围它们的细胞外基质蛋白，这也是部分的基底膜。

The tumor cells produce a whole range of proteases that degrade the proteins of the extracellular matrix that hems them in, part of which is the basement membrane.

youdao