Example sentences of "[been] studied [prep] several " in BNC.
Next page| No | Sentence |
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| 1 | • In rare instances , new-born babies have been studied for several months in a constant environment in a hospital ward . |
| 2 | The subject of intergroup competition has been studied by several researchers , and in general the following conclusions have been reached : |
| 3 | Failures to cite relevant papers have been studied by several authors . |
| 4 | They are sufficiently common to have been studied in several ancient civilisations , and are named after Diophantus of Alexandria who wrote a 13-volume treatise on arithmetic in about 250 AD . |
| 5 | The base-modification pattern has been studied in several synthetic variants of yeast tRNA Asp injected into Xenopus laevis oocytes . |