Example sentences of "and once a [noun sg] " in BNC.

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1 But they could be seriously jeopardised by the Zambian and Zimbabwean proposal because there is no adequate system for marking skins , and once a pelt has reached the fur markets of Frankfurt , London or New York there is no realistic way of knowing where it came from .
2 Some schools abuse us and once a kid 's in , they leave them here — but if I think a school understands us then I 'll fit in with them .
3 And once a choice has been made , this , in itself , imposes constraints .
4 If danger threatens powerful muscles can snap the valves tightly shut , and once a bivalve has closed itself in this way it can be very difficult to force it open — it has ‘ clammed ’ up .
5 And once a flaw has appeared , it tends to be copied as subsequent layers of crystal encrust themselves on top of it .
6 A series is in course of production and implementation in both areas , and once a programme is introduced in Class I this is the beginning of a seven year ride which can not be slowed down or stopped .
7 For a skilled operator it is faster and easier to produce a new drawing , and once a drawing is on file , making changes and producing updated versions becomes much more efficient .
8 and once a repair has been carried out , the wall will dry out .
9 The tube can be lowered into the tank and once a syphon has been made , the tube picks up gravel and agitates it and once you apply your thumb to the end of the hose , the gravel falls back to the bottom , leaving you with clean substrate and a bucketful of dirty water .
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