英语语法分析

To study the ultrastructure of the sarcocyst from pigs, and the influence of preserving pork samples by freezing on the sarcocyst ultrastructure.

研究冷冻保存猪肉对其内的肉孢子虫包囊的超微结构的影响，探讨能否用冷冻保存肉样以待对肉孢子虫的进一步鉴定。