advertising expert的用法和樣例：
例句
- He is a sound effects expert in a film factory, the sound effects of that movie were designed by him.
他是電影廠的一名擬音師，那部電影的擬音效果就是他設計的。 - Our process of torrefication is a slow heating one with manual control and only the expert eye of our master roaster can determine whether the coffee is ready.
我們熟練的焙炒師可以準確地分辨出咖啡的焙炒程度。
