U字英语绕口令 ， An undertaker undertook to undertake an underta-king.The undertaking that the undertaker undertook was the hardest undertaking the undertaker ever undertook.一个办事员办了事。办事员办的事是办事员办过的所有事中最难的事。
who that in youth no virtue uses, in age all honour him refuses.年轻不讲品性，老来不受尊重。 The U.S. twin-screw cruiser.美国双螺旋浆巡洋舰。 ，