section

中文： 块、段、部分

1. A cutting; a part cut out from the rest of something.
2. A part, piece, subdivision of anything.
3. A group of instruments in an orchestra. · The horn section is the group of symphonic musicians who play the French horn.
4. A part of a document, especially a major part; often notated with §.
5. An act or instance of cutting.
6. A cross-section (image that shows an object as if cut along a plane).
7. A cross-section perpendicular the longitudinal axis of an aircraft in flight.
8. A function that generalizes the notion of the graph of a function; formally, a continuous right inverse to the projection map of a fiber bundle.

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