Our European front has been growing progressively weaker the past hundred years.
The working expenses were reduced in a progressively larger ratio, e.g.
The layers below have progressively fewer of these, the central cells being quite colorless.
In Hungary and Russia a zone-tariff system is in operation, whereby the charge per mile decreases progressively with the length of the journey, the traveller paying according to the number of zones he has passed through and not simply according to the distance traversed.
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