Example sentences of "[to-vb] [adv] at a [adj] [noun] " in BNC.

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1 It is possible to work hard at a complete system and get very little from it because of interference by other predators .
2 In summary , when cells are activated , the cytoplasm becomes an excitable matrix which allows a calcium signal to initiate periodically at a specific point before spreading throughout the cell as a regenerative calcium wave .
3 The prescription of glasses is an exact science , and they are made to fit correctly at a specific distance from the eyeball .
4 Where the dealer acted as counterparty to the contract he may be willing to unwind the contract with a customer but there is no incentive for him to do so at a competitive price .
5 The basic assumption of geometric perspective is that although parallel lines never meet , they appear to do so at a vanishing point , on a distant backcloth .
6 The Lebanese army did not enter a nearby camp used by Dev Sol , the Turkish urban guerrilla group , but were expected to do so at a later date .
7 The table was littered with shrimp whiskers , the sponge-cake gobbled up to the last crumb — but all she could do was to sip painfully at a meagre cup of tea and toy with a few shoots of mustard and cress , although she had prepared the extensive meal .
8 ‘ I hope to get home at a reasonable time tonight , but it rather depends on what Kegan wants .
9 The train had been forced to brake hard at a level crossing to miss a taxi and one of the wheels had been damaged .
10 With a zoom , however , it is larger when the angle is wide and the lens is at a short setting ( eg 25mm ) and becomes smaller as the focal length increases — the beam of light , originally wide , is ‘ squashed ’ within the longer tube and becomes narrower , while distances between camera and mirror and between mirror and screen remain the same ( the screen would have to move backwards at a measured rate for the image to stay the same size ) .
11 So I hope , in my remarks , and I hope in the general tone of the debate , there 's enough to reassure London Region that we need to move forward at a careful pace .
12 A typical pattern in psychosomatic illness is for the disease to fluctuate with periods when the symptoms disappear only to return again at a later date .
13 By the end of the war this culture had been defeated , and the victorious Puritans and their nonconformist allies who had gained control of the reins of central government believed they now had an opportunity to impose on the whole nation the same moral reforms that prior to 1640 they had struggled to instigate piecemeal at a local level .
14 There 's a time when you have to strike hard at a decisive moment . ’
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