不可数名词：

营运开支，普通用费，间接费用

a.

在头上的，高架的；包括一切的

ad.

在头顶上，在空中，在高处

英语解释

above the head; over the head

located or originating from above

(computer science) the disk space required for information that is not data but is used for location and timing

a transparency for use with an overhead projector

a hard return hitting the tennis ball above your head

above your head; in the sky

(computer science) the processing time required by a device prior to the execution of a command

the expense of maintaining property (e.g., paying property taxes and utilities and insurance); it does not include depreciation or the cost of financing or income taxes

(nautical) the top surface of an enclosed space on a ship