Example sentences of "[noun sg] at a certain time " in BNC.
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| 1 | Sets of boundary conditions that tell us the state of some regions of the universe at a certain time and what effects propagate into it subsequently from the rest of the universe . |
| 2 | On the other hand , the SeHCAT value corresponds to a seven day elimination of bile acids , whereas the concentration of 7α-hydroxy-4-cholesten-3-one only reflects the synthesis at a certain time . |
| 3 | The problem essentially is that you have got simultaneously to account credibly for someone not being at a certain place at a certain time and to account for them precisely being there . |
| 4 | Even if he is murdered by a homicidal maniac he has chosen to be at a certain place at a certain time . |
| 5 | A mother insists on her small son 's going to bed at a certain time , in spite of all his protests , because she knows he needs enough sleep to keep healthy and alert ; but in his view , she is insisting that he gives up his happy play , cutting him off from the rest of the family , for no good reason . |
| 6 | Of the many drawbacks the most ludicrous is that applications can be made only once a year at a certain time . |
| 7 | ‘ Why do n't you go home anyway , and I 'll tell Gesner he must report to your house at a certain time . |