承蒙相助，本人不胜感激。I'm much obliged to you for helping us.承蒙您的邀请,我觉得很荣幸.I deem it an honour to accept your invitation.承蒙厚爱,十分感激.I am greatly beholden to you for your kindness....

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“承蒙”的拼音为：chéng méng...