他买了一条新领带来让自己看起来更精神。

He bought a new tie to ___smarten up his appearance.

她决定好好打扮一下，让自己看起来更体面些。

She decided to ___smarten up her appearance for the formal dinner.

他们决定改进工作流程以提高生产力。

They decided to ___smarten the workflow to boost productivity.