Explanation: Along the wave along the flow; discussion to explore the source of the source. Follow the water to find its source. Original metaphor composition written by the minor key, and finally point out the analogy of the theme ◇ ins and outs of things. Usage: Joint type; as the predicate attribute; Source: Jin Lu, "Wen Fu" or vibration due to branches to leaves, or along the waves and discuss the source. "