package level短语¹⁴⁴⁹⁷²⁺² 基本例句 组装级 The majority of international computed tomography laser mammography CTLM systems recently have been upgraded to the 4.1 Performance Package level, which includes several significant enhancements. 世界上大多数计算机断层激光扫描 CTLM系统最近已经升级到4.1版，这个版本中有多处明显的改进。 ylsw