Example sentences of "[adv] active period [prep] " in BNC.

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1 A more active period of igneous activity in the Pliocene — Quatemary , involving massive emplacements of magma , caused intense folding and the formation of large thrust sheets in the Eastern Cordillera .
2 For example , even in the relatively active period in which Liebowitz and Horowitz were writing , only a minute proportion of total crime could conceivably be attributed to marginal political groups ' expressing themselves in conventional criminal activity .
3 Above the ground the vine looks dormant , but below the roots are going through their most active period of the year .
4 His most active period in the Commons came during the three Exclusion Parliaments : he served on no fewer than fifty-two committees , involving a wide range of issues .
5 The past 50 years have in fact proved a very active period with several important mathematicians putting the ancient house in order and opening new doors to entirely new possibilities .
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