Lesson 117 Time Flies

　　Time is precious¹. Nobody can afford towaste time. Once time has gone by, it willnever return. You can never turn the clockback. Time passes very quickly. In fact,people say time flies. Time and tide wait forno man. We should, therefore, make thebest use of our time.
 
   光阴似箭 
  　　时间是很宝贵的,谁都浪费不起时间。时间一旦消逝，就永不再回来。你永远也无法让时光倒流。时间过得很快，事实上，人们说光阴似箭。岁月不待人，因此，我们应该好好善用时间。 

1 precious   

adj.宝贵的，珍贵的，过于精致的，珍爱的

参考例句：

• Each life is precious.生命都是宝贵的。
• Spring rain is as precious as oil.春雨贵如油。