an act of taking soldiers away from an area
một hành động đưa binh lính ra khỏi một khu vực
a time when prices are reduced, or when fewer people want to buy something
thời điểm giá giảm hoặc khi có ít người muốn mua thứ gì đó hơn
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Definition of pullback
pullbacknoun
kéo lại
/ˈpʊlbæk//ˈpʊlbæk/The term "pullback" likely originates from the visual metaphor of *pulling back* a rope or string to create tension. This idea of a "retraction" or "drawing back" evolved into the mathematical concept of a pullback in the context of maps and functions. In mathematics, a pullback refers to a function that "pulls back" elements from one space to another, essentially mapping them according to a defined relationship. This visual connection to physical pulling actions contributes to the term's intuitive understanding.
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