(Air traffic controllers) may see fluid.Logical formLearned from10 sentences. Higher levels may lead to accumulation of fluid.Logical formLearned from10 sentences. A virus may be spreaded through (body fluids).Logical formLearned from10 sentences. Fluid can be in connection.Logical formLearned from10 sentences. Fluids can be given.Logical formLearned from10 sentences. A smell may pertain-to a fluid.Logical formLearned from9 sentences. A fluid can be frothy.Logical formLearned from9 sentences. A fluid may be used.Logical formLearned from9 sentences. A fluid can be sugary.Logical formLearned from9 sentences. A cerebrospinal fluid may undergo an examination.Logical formLearned from9 sentences. Fluids can be preservative.Logical formLearned from9 sentences. Pressure may pertain-to a fluid.Logical formLearned from9 sentences. Fluids can be mixed.Logical formLearned from9 sentences. A deal can be constituted-of-or-filled-with fluid.Logical formLearned from9 sentences. Fluid may undergo a development.Logical formLearned from9 sentences.