1、It is a formula that worked very well indeed.这的确是一套很管用的方案。

2、It is very， very strong evidence indeed.这的确是非常非常有力的证据。

3、I was very sad indeed to hear of your father's death.听到令尊大人去世，我感到非常难过。

4、Thank you very much indeed!真的很感谢您！