[inarticulate;clumsy of speech;be clumsy in expressing oneself] 不善于说话
嘴笨嘴笨zuǐbèn〖inarticulate;clumsyofspeech;beclumsyinexpressingoneself〗不善于说话
不善于言辞。如:「我一向嘴笨,不会说好听的话讨好人家。」