Regrettably, he lost to the champion by one point.

遗憾的是，他以一分之差败给了冠军。

Regrettably, the response from the audience was very cold.

令人遗憾的是，现场观众的反应十分冷淡。

Regrettably, the patient was not saved in the end.

不幸的是，这位病人最终没有得救。

Regrettably, some jobs will be lost.

令人遗憾的是有些人将会失去工作。

Regrettably, crime has been increasing in this area.

令人遗憾的是这一地区的犯罪率在不断上升。

Regrettably, he resorts to the familiar numbers game when he boasts that fewer than 300 state enterprises currently remain in the public sector.

遗憾的是，他又玩起了老套的数字游戏，吹嘘说目前属于公有部门的国营企业差不多300家。

The speaker was regrettably indisposed.

很遗憾，演讲人身体不适。

Regrettably we could find no sign of the man and the search was terminated.

不幸，我们无法找到这个人的任何踪迹因此搜寻停止了。