Fish farmers must maintain the temperature of their ponds at steady levels, learn how to adapt to changes in the weather, and monitor the water level and its turbidity.
「工作無分晝夜，而且要有專業的知識：水溫應保持幾度？氣候冷時如何處理？水量多少、水質清澈度等等都不能有一點差錯。