number of chorionic sac

• 绒毛膜囊数

number of chorionic sac的用法和样例：

例句

1. There was no significant difference infection rate between groups inoculated with different number CSO and groups inoculated CSO with conserved different time.
   接种不同卵囊数和卵囊的保存时间这两个参数均对小鼠受感染后的排卵囊情况影响不大。