demonstrate
/ˈdɛmənˌstreɪt/
give an exhibition of to an interested audience
中文释义：演示；证明；示范
The teacher demonstrated the experiment to the class step by step.
老师一步一步地向全班演示了实验。
Recent studies demonstrate that regular exercise improves mental health.
最近的研究证明，定期锻炼能改善心理健康。