Example sentences of "[prep] [adv] [adj] hours [adj] " in BNC.

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1 Both pilots had been off duty for a period of approximately thirty-five hours prior to the trans-Atlantic flight and had flown a total of just over seven hours on the day of the accident .
2 The results showed that rhythms with a period of about 24 hours continued and this confirmed the activity of the body clock during the experiment ( fig 2.1 ) .
3 It had to carry enough fuel for over 20 hours airborne .
4 Avoid all stimulant drugs at least two hours prior to going to bed .
5 JFK is superbly made : at over three hours long it seems short .
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