Duties can be arduous.Logical formLearned from119 sentences. A job can be arduous.Logical formLearned from119 sentences. Journeys can be arduous.Logical formLearned from112 sentences. An effort can be arduous.Logical formLearned from105 sentences. A training can be arduous.Logical formLearned from98 sentences. A labor can be arduous.Logical formLearned from93 sentences. A portion can be arduous.Logical formLearned from91 sentences. A path can be arduous.Logical formLearned from88 sentences. A campaign can be arduous.Logical formLearned from80 sentences. Years can be arduous.Logical formLearned from76 sentences. A process can be arduous.Logical formLearned from72 sentences. A mission can be arduous.Logical formLearned from70 sentences. A search can be arduous.Logical formLearned from69 sentences. A day can be arduous.Logical formLearned from68 sentences. A battle can be arduous.Logical formLearned from68 sentences.