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（雷達等儀器屏幕上的伴有短促尖聲的）光點，信號
A blip is a small spot of light, sometimes occurring with a short, high-pitched sound, which flashes on and off regularly on a piece of equipment such as a radar screen.
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（直線上的）轉折點，跳點
A blip in a straight line, such as the line on a graph, is a point at which the line suddenly makes a sharp change of direction before returning to its original direction.
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暫時的突變；突然的中斷
A blip in a situation is a sudden but temporary change or interruption in it.
例句
Interest rates generally have been declining since last spring, despite a few upward blips in recent weeks.
盡管近幾周出現了幾次短暫的回升，但自去年春天開始利率在整體上還是一直呈下降趨勢。