Example sentences of "[noun sg] over a prolonged period " in BNC.
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| 1 | Some families require extensive help over a prolonged period to overcome long-standing emotional problems in the family which have culminated in a child who is failing to thrive or is obese . |
| 2 | Because a teacher is concerned with a whole person over a prolonged period of time … so he tends to become involved as a whole person . |
| 3 | Declining per capita income over a prolonged period of time usually results in a change of government , sometimes after a revolution or a military coup . |
| 4 | The only people who are likely to experience extended periods of spontaneous regression are those who have been practising deep meditation over a prolonged period of time and have reached a high degree of competence in this field . |
| 5 | themselves admit that ‘ a definitive answer to the question of job techniques and job autonomy could be provided only by systematic and direct observation over a prolonged period of time ’ . |
| 6 | Ground-based observations , on the other hand , offer an opportunity for remote sensing of the plasma in a given region over a prolonged period . |