1/presentation释义：
n. 展示；描述，陈述；介绍；赠送
2/presentation用法例句：
The new product presentation will end on time at 5 pm today.
新品展示将于近日下午5点整准时结束。
She gave a very compelling presentation to the company encouraging them to switch their internet service provider.
她给这家公司做的展示令人信服，促使他们换用网络服务提供商。
