operational cost的用法和樣例：
例句
- Net income Revenues less operating costs.
凈收入收入減去經(jīng)營(yíng)成本。 - Businessmen say eating separately raises cost and they would be happy to accept eating together if diners choose so.
而商家也表示，分餐增加了經(jīng)營(yíng)成本，如果消費者選擇合餐，他們會(huì )更樂(lè )意接受。
