"用演说的腔调说" can be translated into English as "speak in a rhetorical/oratorical tone" or "deliver in a speech-like manner".
Here, "rhetorical" or "oratorical" emphasizes the stylistic and persuasive qualities often associated with public speaking or orations, while "tone" or "manner" refers to the way in which something is said.
For example:
"He spoke in a rhetorical tone, trying to persuade the audience."
"She delivered her points in a speech-like manner, captivating everyone's attention."