Speaking to reporters in Brussels, to have Foreign Minister Carl Bildt of Sweden, which holds the rotating European Union presidency, said the time is not right for recognizing a Palestinian state.

VOA: standard.2009.11.17

So, there is a way to go from the unprimed coordinates to the prime coordinate by rotating your axis and actually calculating the components.

现在我们有一种方法可以从原坐标系,转变到新坐标系,只要旋转坐标轴,并实际地计算一下坐标即可

耶鲁公开课 - 基础物理课程节选

European Commission President Jose Manuel Barroso called the deal an important breakthrough at a joint press conference with Prime Minister Fredrik Reinfeldt of Sweden, which currently holds the rotating European Union presidency.

VOA: standard.2009.10.30

The African Union sent Moammar Gadhafi, who currently holds the rotating head of the pan-African body, to mediate the crisis, hoping he could find a solution acceptable to Mauritanian stakeholders and the international community.

VOA: standard.2009.03.12