The heads of all uk universities are urging ministers to abandon plans to tighten visa rules for foreign students which they say will threaten university finances and undermine the government ' s export drive 英国所有大学的校长正敦促部长们放弃收紧留学生签证规则的计划，他们表示，这些计划将威胁大学的财务状况，并破坏政府的出口努力。
