labor union,trade union,union...[继续阅读]

    general utility...[继续阅读]

    zero frequency (z-f)...[继续阅读]

    well-planned...[继续阅读]

    retrospective survey...[继续阅读]

    external trade by countries of destination or origin...[继续阅读]

    smooth test...[继续阅读]

    国际民(用)航(空)组织...[继续阅读]

    configuration of equilibrium...[继续阅读]

    prediction-realization diagram...[继续阅读]