Example sentences of "[adv prt] at [adv] two [adj] [noun] " in BNC.

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1 The star seems to be oscillating in at least two superimposed periods , and at its peak it must be at least 8000 times as luminous as the Sun .
2 The ALDH2 gene exists in at least two allelic forms , ALDH2*1 and ALDH2*2 .
3 Biologists monitoring the nests saw one of the ICONA seaplanes carry out at least two low-flying sweeps over the nesting area , scooping up water from the delta .
4 It was coined in 1969 by the American scientist John Wheeler as a graphic description of an idea that goes back at least two hundred years , to a time when there were two theories about light : one , which Newton favored , was that it was composed of particles ; the other was that it was made of waves .
5 Fortunately , most local record offices contain an abundance of sources for local history , going back at least two hundred years .
6 In order to make it suitable , Minto believed that it would be necessary to build on at least two extra rooms .
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