| 单词 | police whistle | 
| 释义 | > as lemmaspolice whistle   police whistle  n. a type of loud whistle used by the police. ΘΚΠ society > communication > indication > signalling > audible signalling > signalling with other sounding instruments > 			[noun]		 > sounding of whistle > types of whistle used as signal steam-whistle1840 air whistle1853 police whistle1872 bull1884 1872    Condition of Affairs Late Insurrectionary States: Georgia 		(U.S. Congr.)	 II. 744  				I heard several whistles blow, like police whistles. 1922    J. Joyce Ulysses  ii. viii. [Lestrygonians] 155  				Police whistle in my ears still. 2003    N.Y. Times 		(Nexis)	 11 Dec. 5  				Officer O'Rourke found him in the pitch black..by blowing his police whistle. < as lemmas | 
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