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1·Many countries favour a presidential system of government.

很多国家选择总统制政府。《牛津词典》

2·He reaffirmed support for such a system during his presidential campaign, and things might look very different now if he had continued to back climate action once his opponent was in the White House.

如果在奥巴马进入白宫之后，麦凯恩仍能力挺气候行动，或许情况会截然不同。 然而他放弃了。