这些机器是来开采矿石的吗？
一望无垠的亘古荒漠中，布满了挖掘机、装载机的轮胎印。[{'character': '一', 'pinyin': 'i2', 'highest pitch': 10.57, 'lowest pitch': 8.53, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '望', 'pinyin': 'uang4', 'highest pitch': 11.58, 'lowest pitch': 9.03, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '无', 'pinyin': 'u2', 'highest pitch': 9.07, 'lowest pitch': 8.21, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '垠', 'pinyin': 'in2', 'highest pitch': 8.47, 'lowest pitch': 6.79, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 14.49, 'lowest pitch': 7.72, 'duration': 0.14, 'prosody hierarchy': '#1'}, {'character': '亘', 'pinyin': 'gen4', 'highest pitch': 9.8, 'lowest pitch': 7.05, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '古', 'pinyin': 'gu3', 'highest pitch': 7.05, 'lowest pitch': 5.96, 'duration': 0.15, 'prosody hierarchy': '#1'}, {'character': '荒', 'pinyin': 'huang1', 'highest pitch': 8.31, 'lowest pitch': 6.13, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '漠', 'pinyin': 'mo4', 'highest pitch': 8.22, 'lowest pitch': 6.6, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '中', 'pinyin': 'zhong1', 'highest pitch': 8.85, 'lowest pitch': 8.12, 'duration': 0.26, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.26}, {'character': '布', 'pinyin': 'bu4', 'highest pitch': 9.72, 'lowest pitch': 8.4, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '满', 'pinyin': 'man3', 'highest pitch': 8.4, 'lowest pitch': 5.8, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '了', 'pinyin': 'le5', 'highest pitch': 7.03, 'lowest pitch': 5.8, 'duration': 0.24, 'prosody hierarchy': '#2'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.12}, {'character': '挖', 'pinyin': 'ua1', 'highest pitch': 10.59, 'lowest pitch': 9.4, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '掘', 'pinyin': 'jve2', 'highest pitch': 8.62, 'lowest pitch': 7.31, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '机', 'pinyin': 'ji1', 'highest pitch': 9.87, 'lowest pitch': 7.51, 'duration': 0.27, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.07}, {'character': '装', 'pinyin': 'zhuang1', 'highest pitch': 11.41, 'lowest pitch': 10.81, 'duration': 0.26, 'prosody hierarchy': 'null'}, {'character': '载', 'pinyin': 'zai4', 'highest pitch': 11.62, 'lowest pitch': 7.53, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '机', 'pinyin': 'ji1', 'highest pitch': 9.87, 'lowest pitch': 7.17, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 14.49, 'lowest pitch': 7.17, 'duration': 0.18, 'prosody hierarchy': '#2'}, {'character': '轮', 'pinyin': 'luen2', 'highest pitch': 7.5, 'lowest pitch': 6.36, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '胎', 'pinyin': 'tai1', 'highest pitch': 8.8, 'lowest pitch': 7.23, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '印', 'pinyin': 'in4', 'highest pitch': 8.81, 'lowest pitch': 6.18, 'duration': 0.26, 'prosody hierarchy': '#4'}]