遗憾的是

Unfortunately,no questions from the audience broke the continuity of his harangue.

令人的是,没有听众提出问题来打断的高谈阔论。

It's a pity that the spitbox in the pit was hit and split.

的是西方经济学论文坑内的痰盂被打.

One of many sadnesses in his life was that he never had children.

生中的许多之是没有子。

Unhappily, he never saw that girl again.

的是再也没有见到过那孩。

Regretably, I cannot watch the lively scene in the meeting and the presents distributed by companies present at the meeting .

的是未能看到此次展会的火爆场面和参展商派发的赠品。