The manner in which the decision was announced was extremely regrettable.

宣布决定的方式非常令人遗憾。

《牛津词典》

Arafat was unable to build a completely sovereign state in the modern sense and departed from this world, which was extremely regrettable.

BBC: NEWS | Middle East | World press reflects on Arafat legacy

"It is extremely regrettable that, on top of that, an intrusion into our airspace has been committed in this way, " he said.

BBC: Japan accuses China of airspace intrusion over islands

Solicitor advocate Krista Johnston, defending, said Holgate had expressed remorse for what had happened to Mr Cook and for causing an "extremely regrettable" injury.

BBC: High Court in Edinburgh