regrettable基本解释
adj,令人遗憾的；可惜的；可悲的；抱歉的,同近
This was a very regrettable error..这是个令人很遗憾的错误。
令人遗憾的；可惜的；可悲的；抱歉的英释中释adjsomething that is regrettable is unpleasant, and you wish things could be different
