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| English | Russian |
| difficult security conditions | сложные с точки зрения безопасности условия (The investigation was reopened on 7 June 2004 and completed on 3 December 2004, despite the difficult security conditions in Iraq at that time. aldrignedigen) |
| difficult-to-guess password | трудно угадываемый пароль |
| difficult-to-surmount barrier | труднопреодолимый барьер |
| make difficult to guess | затруднить подбор (пароля translator911) |
| under difficult circumstances | в сложной обстановке (CNN Alex_Odeychuk) |