He just says the first thing that pops into his mind.他脑子里一有闪念就会说出来。I need to pop into the supermarket for some milk.我得赶紧去趟超市买些牛奶。I need to pop into the drugstore for some film.我得去趟杂货店买点胶卷。He regularly pops into the museum in his lunch hour.他常常在午休时间去博物馆小逛一下。