Example sentences of "an excess [prep] [noun] over [noun sg] " in BNC.

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1 For thousands of years , poor drainage and an excess of rainfall over evapo-transpiration has favoured sphagnum peat growth .
2 There is thus now an excess of supply over demand which augurs badly for the UK as its North Sea oil is relatively expensive to produce and this has put certain marginal oil fields out of production .
3 What was detested was an excess of form over content , the gratuitous flamboyance of tail-fins on cars , extravagant use of cloth in clothing .
4 Measurements reveal a pronounced seasonal range in concentration at Mauna Loa of about 6–7 ppm , which reflects an excess of photosynthesis over respiration during the spring and summer , and the reverse during the autumn and winter .
5 If , as seemed likely , one cause of unemployment was an excess of savings over investment , the equalisation of decisions to save and decisions to invest could be brought about by Labour 's plans for progressive taxation which would redistribute income to the poorer sections of society .
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