Example sentences of "[pron] [verb] [vb pp] over a long " in BNC.

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1 Also the junction between the uncorroded metal and the applied patina is very sharp , whereas a patina which has developed over a long period of time will have eaten into the metal in a very irregular and quite characteristic manner that is very difficult to imitate .
2 Within the orbit of the late Roman world , Christianity was primarily receptive ; it inherited a set of institutions ready-made , conformed to a social and political structure which had developed over a long period , and learned to live with a culture which it had little part in creating .
3 What was less obvious was the effect on the system as a whole , which had evolved over a long period of time influenced by a variety of political and economical pressures , and not necessarily in a methodical manner .
4 The final separation may mean an agony of divided loyalty for the children of the marriage or it may spell relief from intolerable tensions which have developed over a long period .
5 Besides , the variations in the pattern and emphasis of such courses seem to have grown up largely pragmatically , as a function of the organizational ‘ discretion ’ that both institutions and academics have in responding to the needs , pressures and priorities they have perceived over a long period of time .
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