英语语法分析

Methods The blood vessel tension responses to drug were measured by rabbit basilaris arteria rings (RBAR) endothelium being removed and intact endothelium in vitro.

测定血管内皮完整组和去血管内皮组的张力变化，观察甲基莲心碱对血管收缩张力的影响是否为血管内皮依赖性的作用。