hang down loosely的解释
1. The plant type construction for high yield was characterized by keeping upper 1-4 leaves erect and arranged tightly or the upper 1-6 leaves erect, while the lower leaves hang down loosely. 其高产株型结构特征是上部1～4片叶紧凑上冲，或上部1～6片叶直立上冲，而下部叶片披散。