位在

Histopathologically, intraepidermal acantholysis is located at the granular layer in PF and suprabasally in PV.

病理上，落叶性天疱层内棘层松解位于颗粒细胞层里，而寻常性天疱则位在基底层之上。

Similar in principle to the enclosing of parenthetic expressions between commas is the setting off by commas of phrases or dependent clauses preceding or following the main clause of a sentence.

类似将附带说放在逗号之间规则，位在句子主要子句之前或之后片语或从属子句，也应以逗号。