PPD test临近单词

PPabbr.包裹邮递（=Parcel Post)abbr.过去分词（=past participle）abbr.邮资付讫的(=postpaid)n.一种中文文件交换软件和通讯软件PPEabbr.个人防护用品(=Personal Protective Equipment)abbr.(尤用于牛津大学)哲学﹑ 政治学和经济学(=philosophy；politics and economics)