pop-up
adj
1 (of the pages of a book) rising into a 3-dimensional form as the book is opened （指书页）打开书本时呈立体状的.
2 [attrib 作定语]
(of an automatic toaster) that operates by causing the toast to move quickly upwards when it is ready （指自动的面包片加热器）面包片加热後自动弹起的.