Bren
来自Big Physics
wiktionary
From Middle English brennen, from Old English bærnan, from Proto-Germanic *brannijaną(“to set on fire”). Cognate with German brennen, Swedish bränna. Doublet of burn; see there for more.
etymonline
Bren
type of machine gun used by the British army in World War II, 1937, short for Bren gun, coined from first letters of Brno, Czechoslovakia, and Enfield, near London. The patent was purchased in Brno, and the gun was manufactured in Enfield.
