| Subject | English | Russian |
| math. | conditions cannot be obtained | не может быть получено (by the usual methods. in Problem 2, this means that a solution of type (2) cannot be obtained by the above technique) |
| Makarov. | the data obtained cannot be regarded as evidence of the postulated reaction for the system is greatly complicated by other reactions | полученные данные нельзя рассматривать как доказательство предполагаемой реакции, ибо система значительно усложнена другими реакциями |