Example sentences of "[verb] [adv] [adv] [prep] a period " in BNC.

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1 Begin by exercising moderately for 5–10 minutes per day , and build up gradually over a period of a month .
2 Always exercise gently to begin with , building up gradually over a period of time and remembering that there is never any need to strain yourself .
3 It will slide on as a whole line , from the bottom right hand corner ( which will take 50 frames to complete ) stay still for 120 frames , and then scatter off randomly over a period of 30 frames .
4 Sometimes the wind swings steadily round over a period of time , and at other times it blows steadily in a curve .
5 For example , the ship has a power meter which drops as you get hit , but builds back up over a period of time , you do n't just simply die when hit .
6 That is why the road fund licence , which taxes ownership rather than use , has been increased more rapidly after a period of stagnation .
7 It is not surprising that two people , who have worked closely together over a period of time , come up with a similar approach to a problem .
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