英语语法分析

What the heck is this new periductal hypoechoic sign?

新的导管周围低回声信号到底代表什么？

Neoplastic cells of PT are probably derived from periductal fibroblast according to the ultrastructure characters.

叶状肿瘤肿瘤细胞的组织学起源是导管周围成纤维细胞。