动 pile up，repeat，fold；量 wad，pack，pile ；

[例句] 他将文件叠起来，塞进自己的书桌抽屉里。 He folded the papers and stuck them in his desk drawer.

[例句] 他把报纸整齐地叠起来，然后抿了口咖啡。 He folded his paper neatly and sipped his coffee.