油腔滑调

It's precisely that sort of slick sales-talk that I mistrust.

我不相信正油腔滑调推销宣传。

Prescott's style, though in his diary he wrote "bother euphony", is euphonious.

普雷斯科特虽然在日记里写“讨厌谐音”，可他写文章风格还有点油腔滑调。

He speaks in unctuous tones.

他说话油腔滑调。