His tiredness caused him to make a regrettable error.
他由于疲劳而犯了个
遗憾
错误。
遗憾
；使懊悔遗憾地，使懊悔地;;,丢脸,不光彩;不愉
;
;;;;为难;;;His tiredness caused him to make a regrettable error.
他由于疲劳而犯了个遗憾错误。
It is highly regrettable that the minister cannot be here in person.
很遗憾，部长不能亲自出席。
The tendency of many economists to sweep noneconomic factors into the dustbin of ceteris paribus is indeed regrettable.
许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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