A school teacher friend of mine in juried his back and had to wear a plaster cast around the upper part of his body.

　　我的一位做教師的朋友背部受了傷，不得不在上身穿上了石膏罩。

　　On his first day of the term, still with the cast under his shirt, he was assigned to teach the most undisciplined class. Stepping confidently into the rowdy classroom, he opened the window as wide as possible. Just then, a strong breeze made his tie flap. Trying to fix the tie, he took a blackboard eraser and hammered a large tack1 through his tie into his chest.

　　開學的第一天，他的石膏罩還穿在身上。他被分派去教學校最不守紀律的班級。他信心十足地走進亂哄哄的教室，把窗子盡可能開得大些。正在這時，一陣強風把他的領帶吹得飄了起來。為了固定領帶，他拿起黑板擦，透過領帶，把一個大頭釘砸入胸膛。

　　He had no trouble with discipline that term.

　　在那個學期里，在他課上的學生們一直是安安靜靜的。