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Dialogue One Booking a Table
 
reserve

预定.
I have reserved a seat on the plane for you. 我已为你预定了飞机座位。

 
around
  大约
around sixty people 大约六十人。
a party of six:a table of six 六人一桌。
   
chance of
  有做某事的可能。
He has no chance of winning. 他没有赢的机会 What are your chance of succeeding? 你们成功的可能性有多大?

   
guarantee
  保证,担保
We cannot guarantee the punctual arrival of trains in foggy weather. 我们不能保证火车在雾天正点到达。
assure
  使确信,使放心(后面常接of sth 或that 从句做宾语)
He assured her of his faith in her. 他使她确信他对她的忠诚。
Before going to bed she assured herself that the door was locked. 就在睡前,她先确定门已锁好。
I would appreciate it, if it could be arranged. 这句话是虚拟语气形式,表示对将来发生的事情的虚拟,一般表示实现的可能性很小。