A general trend can be recognized, but the details are usually unpredictable.
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Related: unpredictable
Prev: take into account the seasons as well as any unpredictable weather. New seeds must be sown and weeds must be pulled.
Next: Some people blamed the laziness to the unpredictable weather, some are burdened by the graduation papers, or the coming important test, some feel anxious about their work performance earlier this year.
