had been done短语²²⁶²⁵ 基本例句 🌏过去完成时；过去完成时的被动语态；现在完成进行时 They also claim the UNDP was duped into providing computer equipment that could be used for a nuclear programme, without first seeking an export licence as had been done in1999. 他们还声称联合国开发计划署受到蒙蔽，在没有像1999年一样办理出口许可证的前提下，提供了可用于核计划的计算机设备。 ecocn