Example sentences of "of [noun] to act [prep] a " in BNC.

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1 In the community tank where the decor consists of numerous caves made from rockwork , with a good depth of gravel to act as a filter medium , and where the fish tend to dig less than in a tank especially set up for breeding , then undergravel filtration will be adequate once the biological action in the gravel has become firmly established .
2 A business can not plan without making forecasts , and it can not make forecasts without having some kind of plan to act as a framework for forecasters to use .
3 SECTION MAIN POINTS 1 & 1.1 Role and A business can not plan without making purpose of forecasting forecasts , and can not forecast without having some kind of plan to act as a framework .
4 Two Australian scientists have developed a chemical process which significantly increases the ability of clothing to act as a barrier against ultraviolet radiation .
5 He added that there might be a sufficient pool of volunteers to act as a new breed of ‘ civil justices ’ .
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