Could you enlarge upon your plan?你能否详细谈谈你的计划? I wish to enlarge upon a statement made by Gary Docking.我想就加里·多金的话再展开说一下。The committee can enlarge upon the scheme I mentioned.委员会可详细说明我所提到的方案。He refused to enlarge upon his reasons for leaving his job.他拒绝详细说明他辞职的原因。