pre-service英p'riːs'ɜːvɪs美p'riːs'ɜːvɪsCOCA¹⁸¹³⁵BNC⁷²⁴²⁸iWeb³¹⁹⁰³ 基本例句 adj.就业前的¹⁰⁰ In10 of the12 countries studied, current pre-service training is insufficient to maintain the existing density of health workers once all causes of attrition are taken into account. 考虑到所有人员耗损的因素,在12个被研究的国家中,有10个国家的当前岗前培训不足以维持现有的卫生工作者的密度。 who