公司高管在会议上拒绝提供任何细节，一直拖延着谈判进程。

The company executives ___stonewalled the negotiation by refusing to provide any details during the meeting.

尽管我们多次提出请求，政府官员还是对我们的投诉置之不理。

Despite our repeated requests, the officials ___stonewalled our complaints.