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| English | Russian |
| let us denote by [a] as is customary | как обычно (the integral part of ...) |
| as is customary when | как это обычно делается |
| it has become customary | входить в обычай |
| it is customary | традиционно (to express и т.п.) |
| it is customary to | принято |
| it is customary to assume that | принято считать, что |
| it is customary to represent vectors graphically | принято |
| it is not customary | не принято |