土壤里的化学物质对食物链的贡献是不可忽视的。
土壤里的化学物质进入食物链后，最终仍是被人类自己吃掉。[{'character': '土', 'pinyin': 'tu2', 'highest pitch': 9.8, 'lowest pitch': 8.87, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '壤', 'pinyin': 'rang2', 'highest pitch': 9.77, 'lowest pitch': 8.7, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '里', 'pinyin': 'li3', 'highest pitch': 9.38, 'lowest pitch': 6.01, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 7.46, 'lowest pitch': 6.01, 'duration': 0.15, 'prosody hierarchy': '#2'}, {'character': '化', 'pinyin': 'hua4', 'highest pitch': 10.9, 'lowest pitch': 7.46, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '学', 'pinyin': 'xve2', 'highest pitch': 9.36, 'lowest pitch': 7.0, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '物', 'pinyin': 'u4', 'highest pitch': 9.59, 'lowest pitch': 6.3, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '质', 'pinyin': 'zhiii4', 'highest pitch': 7.17, 'lowest pitch': 5.03, 'duration': 0.22, 'prosody hierarchy': '#2'}, {'character': '进', 'pinyin': 'jin4', 'highest pitch': 8.53, 'lowest pitch': 7.24, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '入', 'pinyin': 'ru4', 'highest pitch': 7.24, 'lowest pitch': 6.56, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '食', 'pinyin': 'shiii2', 'highest pitch': 8.29, 'lowest pitch': 6.66, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '物', 'pinyin': 'u4', 'highest pitch': 9.59, 'lowest pitch': 8.29, 'duration': 0.11, 'prosody hierarchy': 'null'}, {'character': '链', 'pinyin': 'lian4', 'highest pitch': 9.47, 'lowest pitch': 7.43, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '后', 'pinyin': 'hou4', 'highest pitch': 8.56, 'lowest pitch': 4.76, 'duration': 0.28, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.26}, {'character': '最', 'pinyin': 'zuei4', 'highest pitch': 8.1, 'lowest pitch': 6.52, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '终', 'pinyin': 'zhong1', 'highest pitch': 8.93, 'lowest pitch': 6.52, 'duration': 0.28, 'prosody hierarchy': '#2'}, {'character': '仍', 'pinyin': 'reng2', 'highest pitch': 8.93, 'lowest pitch': 6.6, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '是', 'pinyin': 'shiii4', 'highest pitch': 10.47, 'lowest pitch': 8.5, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '被', 'pinyin': 'bei4', 'highest pitch': 8.9, 'lowest pitch': 7.22, 'duration': 0.13, 'prosody hierarchy': '#1'}, {'character': '人', 'pinyin': 'ren2', 'highest pitch': 7.22, 'lowest pitch': 5.48, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '类', 'pinyin': 'lei4', 'highest pitch': 8.0, 'lowest pitch': 6.3, 'duration': 0.18, 'prosody hierarchy': '#1'}, {'character': '自', 'pinyin': 'zii4', 'highest pitch': 10.14, 'lowest pitch': 6.55, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '己', 'pinyin': 'ji3', 'highest pitch': 5.92, 'lowest pitch': 4.7, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '吃', 'pinyin': 'chiii1', 'highest pitch': 7.43, 'lowest pitch': 6.98, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '掉', 'pinyin': 'diao4', 'highest pitch': 7.75, 'lowest pitch': 5.62, 'duration': 0.29, 'prosody hierarchy': '#4'}]