四、补充答复
 

　　In further reply to  your letter of August 15,2006 .....
 

　　With further reference to
 

　　五、接信时表示喜悦
 

　　I noted with pleasure
 

　　I was pleased to learn
 

　　I was glad to know
 

　　I was delighted to learn  from your letter of August 15,2006 .....
 

　　I was gratified to learn
 

　　It is gratifying to learn
 

　　It is a pleasure to learn
 

　　六、接信时表示不愉快或遗憾
 

　　I am sorry to learn
 

　　I was disappointed to learn > from your letter of August 15,2006 ...
 

　　I learned with rergret
 

　　I was surprised to learn