Example sentences of "period [prep] many years " in BNC.

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1 In fact the writings span a period of many years .
2 The interference with Primary Control builds up gradually , over a period of many years , and because of this most of us are unaware of moving in inefficient , and in many cases harmful , ways .
3 In practice , however , this is not essential for all species , and in particular those which have come acclimated to aquarium life over a period of many years are remarkably tolerant of what is strictly quite unsuitable water chemistry .
4 John Szarkowski wrote in the preface to the first volume : " Atget 's own prints were made over a period of many years , on a variety of photographic papers .
5 Over a period of many years I had a succession of research students working On the Eocene strata of the Isle of Wight , off the south coast of England .
6 Some of the later remodelling work was done by Francesco Maria Richini , although what we now see is in Romanesque style , even though it post-dates the period by many years .
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