Unit18 To the Unknown Teacher第十八颗 致无名之师I sing the praise of the Unknown Teacher.我要歌颂无名之师。Great Generals win campaigns，but it is the Unknown Soldier who wins the war.伟大的将军赢得战役，但打赢战争的却是无名战士。Famous educators plan new systems of pedagogy，but it is the Unknown Teacher who delivers and guides the young.知名