n.弹出式；[棒]内野飞球；自动起跳式装置；adj.弹起的；有自动起跳装置的； 变形： 复数：pop-ups 英英释义： pop-up[ 'pɔp,ʌp ]n.a book (usually for children) that contains one or more pages such that a three-dimensional structure rises up when a page is opened同义词：pop-up booka short high fly ball同义词：pop