| 单词 | play clock | 
| 释义 | > as lemmasplay clock   play clock  n. 		 (a) a toy clock;		 (b) American Football a timer displaying the number of seconds remaining before the offensive team must restart play. ΚΠ 1904    Logansport 		(Indiana)	 Jrnl. 22 Dec. 6/2  				Dear Santa Claus,..I am going to write for my brother Fred... He wants a horse and a play clock. 1976    Washington Post 18 Mar.  c4/1 		(heading)	  				NFL decides to use 30-second play clock. 1991    Details Dec. 107/3  				With just one second remaining on the play clock, he took the snap. 2006    S. Weidman Gifted 118  				It features a colorful frame and fabric curtains, a chalkboard, and a play clock. 2010    Hamilton 		(Ont.)	 Spectator 		(Nexis)	 9 June (Sports section) 4  				We have a 20-second play clock here versus a 45-second clock down south. < as lemmas | 
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