Teacher:Johnny,why are you late for school every morning?
Johnny:Every time I come to the corner,a guidepost（路牌,路标） says,'School -- Go Slow'
老师：约翰,为什么你每天早上都迟到呢?
约翰：每次我走到街角的时候,都有一块路牌写着：“学校-小心慢行”