英语语法分析

A canine model of secondary hypersplenism was established by ordinal ligation of gastrosplenic vein trunk, splenic vein and its collateral branches.

通过依次结扎犬脾门处脾静脉主干、胃脾静脉干及脾静脉属枝，建立继发性脾功能亢进动物模型。