The seniors organizations sent out mailings to their constituencies.老年人组织向各自的会员寄送了邮件。The Tories are concentrating their campaign in the key marginal constituencies.保守党正把他们的竞选活动集中在关键的边缘选区。Members of Parliament are spending the weekend canvassing opinion in their constituencies.国会议员这个周末要向所在选区的选民征求意见。