没有人愿意浪费时间坐在这里听没有实质性的演讲。
No one wants to waste their time sitting through a presentation with no substance.
演讲者如果只想着给听众留下好印象，而不是通过演讲给听众带来的一些实质性的改善，那么只能流于平庸。
When a speaker's intention is to impress the audience rather than improve the condition of the audience, the speech tends to fall flat.
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