理由reason;ground;argument;rationale
他的～不能成立。His argument is untenable;He’s giving a lame excuse./有充分～相信have every reason to believe/沒有～過于樂觀have no ground for euphoria/找～為自己的錯(cuò)誤辯解try to find an excuse for one’s error;try to explain away one’s error/沒有～自滿have no ground for self-complacency/說明～ give the rationale/存在的～raison d’être |