single-siteCOCA¹⁴²²⁷⁵BNC²³⁶²¹³⁺¹ 基本例句 🌏单点;单地域;单活性位点 Objective To study the feasibility of trans umbilical single-site laparoscopic surgery for tumors in women. 目的探讨经脐单孔腹腔镜在妇科手术中的应用及其可行性。 www.301xuebao.com.cn The main catalysts for polymerization are single-site catalysts, Ziegle- Natta catalysts and Phillips catalysts. 聚合反应的催化剂主要包括单活性点催化剂、齐格勒-纳塔催化剂和菲利浦催化剂。 dictall