overhead

• 位于头顶上方的；也用于指与特定产品或服务无直接关联的费用或开支。

Located above one's head; also used to describe costs or expenses that are not directly tied to a specific product or service.

1. Located or originating from aboveB1formal

   Situated or happening above the level of the head or in the sky.

   上方的

   • The overhead lights flickered during the storm.
   • An overhead cable carries electricity across the street.
   • The plane's overhead compartments were full.

   同义词aboveaerialaloftelevatedupper

   反义词belowbeneathunderfootunderground

• 副词，表示“在头顶上方”或“在空中”。描述位于说话人或参照点正上方的位置。

An adverb meaning "above one's head" or "in the sky." It describes a position or location situated directly above the speaker or a reference point.

1. Above one's headA2formal

   Located or positioned directly above someone or something, especially in the sky or ceiling.

   头顶上方

   • Birds were flying overhead in the clear blue sky.
   • The plane passed overhead with a loud roar.
   • We could hear the sound of helicopters overhead.

   同义词abovealofthigh upover

   反义词below

2. Above the headA2formal

   Situated or occurring above the level of the head, often referring to objects or structures.

   在头顶上方

   • The light fixture hangs overhead in the center of the room.
   • He raised his arms overhead to stretch.
   • The bridge has a sign overhead indicating the exit.

   同义词abovealoftin the air

   反义词belowbeneathunderfootunderneath

• 多义词，主要包括间接成本或经常性开支（如租金、水电费等非直接生产费用），计算机系统中占用处理时间或磁盘空间等与数据无直接关系的开销，投影仪用的透明胶片，船舱等的顶部，以及网球中的过顶扣杀。

A noun with multiple meanings, including ongoing business expenses (such as rent and utilities), the processing time or disk space required by a computer system for tasks not directly related to data, a transparency used with an overhead projector, the top surface of an enclosed space on a ship, or a tennis shot hit above the head.

不可数

1. Property maintenance costsB2formalbusiness

   The ongoing expenses required to maintain a property, such as taxes, utilities, and insurance, excluding depreciation, financing, or income taxes.

   物业维护费用

   • The company's overhead includes rent, utilities, and insurance.
   • We need to reduce our overhead to increase profitability.
   • Property overhead can be a significant burden for small businesses.

2. Computer processing overheadC1formalIT

   The processing time required by a device before executing a command, often due to system management tasks.

   开销

   • The system's overhead slows down data processing.
   • Minimizing overhead is crucial for efficient computing.
   • The overhead for this operation is about 10 milliseconds.

   同义词burdenlatency

3. Disk space overheadC1formalIT

   The disk space used for non-data information, such as location and timing data, rather than actual content.

   磁盘空间开销

   • The file system overhead reduces available storage space.
   • Overhead for metadata can consume up to 5% of the disk.
   • We need to account for overhead when calculating storage needs.

4. Overhead projector transparencyB1formal

   A transparent sheet used with an overhead projector to display images or text.

   投影胶片

   • The teacher placed an overhead on the projector for the lesson.
   • We used overheads to present the data during the meeting.
   • Overhead transparencies are now largely replaced by digital slides.

   同义词acetatefoilslidetransparencyviewgraph

5. Ship's ceilingC2formal

   The top surface of an enclosed space on a ship, such as a cabin or hold.

   舱顶

   • The sailor painted the overhead in the engine room.
   • Water dripped from the overhead in the old ship.
   • The overhead in the cabin was low, requiring caution.

   同义词ceiling

6. Tennis smashB2informalsport

   A hard shot in tennis where the ball is struck above the head, typically a return of a lob.

   过顶扣杀

   • He won the point with a powerful overhead.
   • Her overhead was too fast for the opponent to return.
   • Practice your overhead to improve your net game.

   同义词smash