经济学人下载:一周要闻 特朗普首次动用总统否决权 英下议院议长介入退欧 特朗普会晤"热带特朗普"

A presidential election was scheduled for last December.
总统选举原计划在去年12月举行。 

2.ruling party 执政党

Voters wish to register their dissatisfaction with the ruling party.
选民希望表达他们对执政党的不满。

3.dating back to 追溯到

This is an old building dating back to the 16th.
这是一栋追溯至16世纪的古老建筑物。

4.ruling out 排除

Authorities say they're not ruling out the idea of criminal activity.
当局表示他们不排除犯罪活动的企图。