momentary impulse
definitions
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A sudden, brief, and often irrational urge or desire to act without prior thought or planning.de: Kurzzeitiger Impuls
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A transient physical sensation or a short-lived electrical signal occurring in a biological or mechanical system.de: Kurzer Impuls
examples
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He bought the expensive watch on a momentary impulse.
Er kaufte die teure Uhr aus einem kurzen Impuls heraus.
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The sensor detected a momentary impulse in the electrical circuit.
Der Sensor erkannte einen kurzen Impuls im Stromkreis.