“janitorial service”簡單造句，janitorial service造句子

It was not until one night, we were doing our clean up details (the military saves money on janitorial services by farming out its students to indentured servitude) that I got curious.

These include indirect materials and indirect labor-- such as supplies, heat and light, maintenance and repairs, depreciation and insurance, taxes, rent, advertising and transportation, as well as clerical, legal and janitorial services.