Example sentences of "[prep] a few per " in BNC.
Next page| No | Sentence |
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| 1 | An alternative is that it consists of a few per cent silicates , all the rest being iron-rich compounds such as FeS and FeO , which have densities between those of metallic iron and silicates . |
| 2 | Arsenic is very volatile and was unobtainable by ancient smelting techniques , but arsenic minerals commonly occur in association with copper ores and an alloy with a few per cent can be obtained by smelting these . |
| 3 | Hard solders , on the other hand , were usually of the same metal as the object they were used on , but alloyed with a few per cent of another metal in order to reduce the melting point . |
| 4 | In addition , the number of β-galactosidase staining positive cells was also consistently above a few per cent of cells for the serum starved cells . |
| 5 | To avoid excessive changes in the sample cross section , elongations are limited to a few per cent and are followed over approximately three decades of time . |