Example sentences of "[noun sg] [prep] [adj] periods of time " in BNC.
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31 | This enables underwater operation for long periods of time . |
32 | Towards the end of the research most of the children referred had been in care for shorter periods of time and were still in more or less meaningful contact with members of their natural families . |
33 | It became clear therefore , that this text , as a class reader , had a large audience for sustained periods of time . |
34 | Comparisons of this kind are difficult to make with accuracy over long periods of time ; but the direction and size of the change are beyond doubt . |
35 | The Leyden jar was simply a primitive condenser , capable of storing static electricity for short periods of time , and more refined experiments had to await the invention of reliable sources of electric current . |
36 | Studying the body clock for extended periods of time |