mention regretfully遗憾地提到
linger regretfully遗憾地逗留
Regretfully Apart根分开
observe regretfully遗憾地说
tell regretfully遗憾地说
judge regretfully遗憾地判决
But Regretfully但很遗憾
die regretfully遗憾的等死
plan regretfully遗憾地计划
"I must regretfully decline your kind invitation"