closed circuit...[继续阅读]

    summer resort...[继续阅读]

    frontier defense inspection station...[继续阅读]

    checkpoint...[继续阅读]

    mark; landmark...[继续阅读]

    standard; par:请务必保证一切东西都在规定标准之上。Please see to it that everything should be kept above par....[继续阅读]

    Make yourself comfortable.Don’t mention it. You are welcome....[继续阅读]

    Take it easy....[继续阅读]

    no great shakes...[继续阅读]

    no later than...[继续阅读]