我们应该怎样来提高棉花质量呢？
解决种棉效益低最主要是提高棉花质量。[{'character': '解', 'pinyin': 'jie3', 'highest pitch': 9.11, 'lowest pitch': 7.67, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '决', 'pinyin': 'jve2', 'highest pitch': 9.04, 'lowest pitch': 7.67, 'duration': 0.25, 'prosody hierarchy': '#1'}, {'character': '种', 'pinyin': 'zhong4', 'highest pitch': 10.84, 'lowest pitch': 8.33, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '棉', 'pinyin': 'mian2', 'highest pitch': 9.09, 'lowest pitch': 7.52, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '效', 'pinyin': 'xiao4', 'highest pitch': 9.77, 'lowest pitch': 8.18, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '益', 'pinyin': 'i4', 'highest pitch': 8.18, 'lowest pitch': 6.73, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '低', 'pinyin': 'di1', 'highest pitch': 9.7, 'lowest pitch': 6.89, 'duration': 0.26, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.04}, {'character': '最', 'pinyin': 'zuei4', 'highest pitch': 11.14, 'lowest pitch': 8.85, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '主', 'pinyin': 'zhu3', 'highest pitch': 12.08, 'lowest pitch': 6.34, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '要', 'pinyin': 'iao4', 'highest pitch': 7.58, 'lowest pitch': 6.34, 'duration': 0.24, 'prosody hierarchy': '#2'}, {'character': '是', 'pinyin': 'shiii4', 'highest pitch': 7.31, 'lowest pitch': 6.63, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '提', 'pinyin': 'ti2', 'highest pitch': 6.3, 'lowest pitch': 6.19, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '高', 'pinyin': 'gao1', 'highest pitch': 8.64, 'lowest pitch': 8.27, 'duration': 0.21, 'prosody hierarchy': '#2'}, {'character': '棉', 'pinyin': 'mian2', 'highest pitch': 9.09, 'lowest pitch': 6.3, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '花', 'pinyin': 'hua1', 'highest pitch': 10.09, 'lowest pitch': 7.86, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '质', 'pinyin': 'zhiii4', 'highest pitch': 10.88, 'lowest pitch': 9.38, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '量', 'pinyin': 'liang4', 'highest pitch': 9.38, 'lowest pitch': 4.61, 'duration': 0.27, 'prosody hierarchy': '#4'}]