not just a pretty face 不只是一张漂亮脸蛋；不只是徒有其表；不是虚有其表

【例句】
His good looks won him the election but he has still to prove that he's not just a pretty face.
他由于仪表堂堂而当选，但他尚须证明决非徒有其表。

Diane is not just a pretty face, she is training to be a barrister.
黛安不仅仅是徒有其表，她正在接受培训，成为一名大律师。