^Oxford Dictionaries:Time. Oxford University Press. 2011 [18 December 2011]. (原始内容存档于2012-07-04). the indefinite continued of existence and events in the past, present, and future regarded as a whole
^Webster's New World College Dictionary. 2010 [9 April 2011]. (原始内容存档于2011-08-05). 1.indefinite, unlimited duration in which things are considered as happening in the past, present, or future; every moment there has ever been or ever will be… a system of measuring duration 2.the period between two events or during which something exists, happens, or acts; measured or measurable interval
^"Newton did for time what the Greek geometers did for space, idealized it into an exactly measurable dimension." About Time: Einstein's Unfinished Revolution, Paul Davies, p. 31, Simon & Schuster, 1996, ISBN 978-0-684-81822-1
^Official Baseball Rules, 2011 Edition. Rules 8.03 and 8.04(Free PDF download). Major League Baseball. 2011 [7 July 2012]. (原始内容存档(PDF)于2017-07-01). Rule 8.03 Such preparatory pitches shall not consume more than one minute of time...Rule 8.04 When the bases are unoccupied, the pitcher shall deliver the ball to the batter within 12 seconds...The 12-second timing starts when the pitcher is in possession of the ball and the batter is in the box, alert to the pitcher. The timing stops when the pitcher releases the ball
^Guinness Book of Baseball World Records. Guinness World Records, Ltd. [7 July 2012]. (原始内容存档于2012-06-06). The record for the fastest time for circling the bases is 13.3 seconds, set by Evar Swanson at Columbus, Ohio in 1932...The greatest reliably recorded speed at which a baseball has been pitched is 100.9 mph by Lynn Nolan Ryan (California Angels) at Anaheim Stadium in California on 20 August 1974.