A life can be arduous.Logical formLearned from38 sentences. A hike can be arduous.Logical formLearned from37 sentences. A voyage can be arduous.Logical formLearned from36 sentences. Struggles can be arduous.Logical formLearned from36 sentences. Labors can be arduous.Logical formLearned from34 sentences. A task may remain arduous.Logical formLearned from32 sentences. A rehabilitation can be arduous.Logical formLearned from32 sentences. Months can be arduous.Logical formLearned from31 sentences. A challenge can be arduous.Logical formLearned from31 sentences. Travel can be arduous.Logical formLearned from30 sentences. A business can be arduous.Logical formLearned from29 sentences. Research can be arduous.Logical formLearned from29 sentences. Circumstances can be arduous.Logical formLearned from29 sentences. A fight can be arduous.Logical formLearned from28 sentences. A time can be arduous.Logical formLearned from28 sentences.