His tiredness caused him to make a regrettable error.
他由于疲劳而犯了个
遗憾的错误。
遗憾的；使懊悔的遗憾地，使懊悔地不愉快的;震惊的;为难的;His tiredness caused him to make a regrettable error.
他由于疲劳而犯了个遗憾的错误。
It is highly regrettable that the minister cannot be here in person.
很遗憾，部长不能亲自
。
The tendency of many economists to sweep noneconomic factors into the dustbin of ceteris paribus is indeed regrettable.
多经济学家倾向于将非经济因素视为垃圾，这真是遗憾。
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